244 Facts About Piotr Wozniacki

Caroline Wozniacki is a Danish former professional tennis player.

Piotr Wozniacki was ranked world No 1 in singles for a total of 71 weeks, including at the end of 2010 and 2011.

Piotr Wozniacki achieved the top ranking for the first time on 11 October 2010, becoming the 20th player in the Open Era and the first woman from a Scandinavian country to hold the top position.

Piotr Wozniacki won a Grand Slam singles title at the 2018 Australian Open, beating Simona Halep and becoming the first Dane to win a Grand Slam singles title.

Piotr Wozniacki won the season-ending WTA Finals in Singapore in 2017, beating Venus Williams, after finishing runner-up to Clijsters at the event in 2010.

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Piotr Wozniacki retired on 24 January 2020, following a third-round loss in the 2020 Australian Open.

The couple moved to Denmark when Piotr Wozniacki signed for the Danish football club Boldklubben 1909.

Piotr Wozniacki's older brother, Patrik Wozniacki, is a former professional footballer in Denmark.

Piotr Wozniacki had a career-high junior ranking of No 2 in the world.

Piotr Wozniacki made her debut on the ITF Junior Circuit, the premier 18-and-under junior tour that is run by the International Tennis Federation, in October 2003 at 13 years and 3 months old.

Piotr Wozniacki reached the final at both singles events, winning the second over compatriot Hanne Skak Jensen.

From this point on, Piotr Wozniacki only competed in Grade A and Grade 1 events, the two highest-level tournaments.

Piotr Wozniacki made her Grade A debut at Wimbledon before turning 14, losing her first main draw match to Bojana Bobusic.

Piotr Wozniacki won several junior tournaments in 2005, including the Orange Bowl Tennis Championship.

Piotr Wozniacki was seeded second with partner Anna Tatishvili in the doubles tournament, but the pair was knocked out in the semifinals by the French-Italian pair of Alize Cornet and Corinna Dentoni, who were seeded eighth.

However, Piotr Wozniacki went on to win the Wimbledon girls' singles title, beating Magdalena Rybarikova in the final.

Piotr Wozniacki defeated top-100 players Iveta Benesova and Eleni Daniilidou, then lost to eventual champion and third-seeded Zheng Jie.

Piotr Wozniacki was said to have used an expletive in referring to a linesman who made a disputed call.

Piotr Wozniacki obtained a wildcard for the Indian Wells Open main draw and made her Tier I debut there.

Piotr Wozniacki was knocked out in the second round by Martina Hingis.

Piotr Wozniacki then made the semifinals of the Japan Open in Tokyo in October, her first career WTA Tour semifinal, and as a result became the first Danish woman to reach a WTA semifinal since Tine Scheuer-Larsen at Bregenz in 1986.

At the Australian Open, Piotr Wozniacki defeated Gisela Dulko and 21st seed Alona Bondarenko on her way to the round of 16, where she lost to the eventual finalist and fourth-seeded Ana Ivanovic.

At the French Open, Piotr Wozniacki was seeded 30th, making this the first Grand Slam tournament in which she was seeded.

Piotr Wozniacki again lost in the third round to the eventual champion and world No 2 Ana Ivanovic.

Piotr Wozniacki won her first WTA Tour title at the Nordic Light Open in Stockholm without dropping a set, defeating fifth seed Anabel Medina Garrigues in the quarterfinals, top seed and world No 10 Agnieszka Radwanska in the semifinals, and Vera Dushevina in the final.

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Piotr Wozniacki won her second WTA Tour title at the Pilot Pen Tennis in New Haven, after defeating three seeded players, Dominika Cibulkova, Marion Bartoli and Alize Cornet, en route to the final, where she defeated world No 11, Anna Chakvetadze.

Piotr Wozniacki defeated world No 14, Victoria Azarenka, in the third round, but lost to second-seeded and eventual runner-up Jelena Jankovic in the fourth round.

Piotr Wozniacki then took part in the Danish Open, in her hometown of Odense.

Piotr Wozniacki ended the year ranked 12th in singles and 79th in doubles.

Piotr Wozniacki started the season in Auckland, where she lost to Elena Vesnina in the quarterfinals.

Piotr Wozniacki reached the quarterfinals in Sydney, this time losing to world No 2 Serena Williams after having three match points.

Piotr Wozniacki then took part in the first two Premier Mandatory tournaments of the year.

Piotr Wozniacki won her first title of the year at the Amelia Island Championships on green clay in Ponte Vedra Beach, where she defeated Canadian Aleksandra Wozniak.

Piotr Wozniacki suffered early exits in her next two tournaments, losing to Marion Bartoli in the second round in Stuttgart, and to Victoria Azarenka in the third round in Rome.

Piotr Wozniacki reached the final of the inaugural Premier Mandatory Madrid Open but she lost to world No 1, Dinara Safina.

Piotr Wozniacki won her second 2009 title on the grass of Eastbourne.

Piotr Wozniacki made her best result to date by becoming the first Danish woman to reach a Grand Slam final.

Piotr Wozniacki then lost to Maria Jose Martinez Sanchez in the first round of the China Open, and to Samantha Stosur in the semifinals in Osaka.

Piotr Wozniacki won two of three group matches and advanced to the semifinals.

Piotr Wozniacki was seeded fourth at the Australian Open, her first top-eight seed in a Grand Slam.

Piotr Wozniacki again fell to Li, this time in the fourth round, in straight sets.

At the Miami Open, Piotr Wozniacki lost her quarterfinal match against the newly returned Justine Henin.

Piotr Wozniacki then competed at the Family Circle Cup in Charleston.

Piotr Wozniacki then reached the quarterfinals in Warsaw, but retired after losing the first set.

Piotr Wozniacki posted her best result at Roland Garros by advancing to the fourth round without dropping a set.

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Piotr Wozniacki partnered with Daniela Hantuchova in doubles, but they withdrew before their second round match against the Williams sisters because of a right shoulder injury to Hantuchova.

Piotr Wozniacki was seeded third at Wimbledon, where she defeated Tathiana Garbin, Chang Kai-chen, and Anastasia Pavlyuchenkova en route to the fourth round, where she was defeated by Petra Kvitova.

Piotr Wozniacki defeated Klara Zakopalova to win her second title of the year.

Piotr Wozniacki defeated both Kuznetsova and Vera Zvonareva on the same day for her third singles title of the year.

Piotr Wozniacki was the top seed at the US Open due to the withdrawal of world No 1, Serena Williams.

Piotr Wozniacki won back-to-back three-setters against Victoria Azarenka and Elena Dementieva, the latter of whom she beat in the final to win her fifth title of the year.

Piotr Wozniacki avenged that loss, which ensured that she would replace Serena Williams as the new world No 1 after the tournament.

Piotr Wozniacki was the fifth player to reach the No 1 position without having won a Grand Slam tournament.

Piotr Wozniacki became the first Danish player, man or woman, to reach the top ranking.

Piotr Wozniacki ultimately won the tournament, defeating Zvonareva in the final to win her sixth title of the year and twelfth overall.

At the year-end WTA Championships in Doha, Piotr Wozniacki was drawn in a group with Francesca Schiavone, Samantha Stosur and Elena Dementieva.

Piotr Wozniacki defeated Dementieva in her first round-robin game, but lost to Stosur in the second.

Piotr Wozniacki won her last round-robin match in the group against Schiavone, securing the year-end world No 1 rank and a place in the semifinals against the winner of the other group, Vera Zvonareva.

Piotr Wozniacki defeated her, but then lost the final in three sets to Kim Clijsters.

Piotr Wozniacki ended the season with six WTA singles titles, the most on the tour.

Piotr Wozniacki began her 2011 season with an exhibition match in Thailand against Kim Clijsters where she lost in a super tie-break.

Piotr Wozniacki then played another exhibition, the team Hong Kong Tennis Classic, where she represented and was captain of Team Europe.

Piotr Wozniacki won two matches against Team Asia Pacific, then was crushed by world No 2 Vera Zvonareva in the final against Team Russia.

Piotr Wozniacki received a bye into the second round, where she lost to Dominika Cibulkova.

Piotr Wozniacki received a bye to the second round in Dubai where, in the quarterfinals, she beat Shahar Pe'er to ensure her No 1 position in the next rankings update.

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Piotr Wozniacki went on to defeat Svetlana Kuznetsova in the final to take her 13th career singles title and first of the year.

Piotr Wozniacki made an uncharacteristic 52 unforced errors and later said she had been playing a lot of matches when she was asked about fatigue.

At the Brussels Open, Piotr Wozniacki reached the semifinals, where she defeated 3rd seed and reigning French Open champion, Francesca Schiavone.

Piotr Wozniacki was the top seed at the French Open, but was upset in the third round by 28th seed Daniela Hantuchova.

Piotr Wozniacki was the top seed at the Cincinnati Open, but lost in the second round to world No 76, Christina McHale.

Piotr Wozniacki then progressed to the semifinals by defeating Andrea Petkovic in the quarterfinals.

Piotr Wozniacki lost to Petra Kvitova in her final round-robin match and so failed to advance to semifinals for the first time in three appearances.

Piotr Wozniacki finished the year as world No 1 for the second consecutive year.

Piotr Wozniacki began her season by representing Denmark at the 2012 Hopman Cup with Frederik Nielsen as her partner.

Piotr Wozniacki won two of her three round robin matches in singles, defeating Bethanie Mattek-Sands and Tsvetana Pironkova, then lost to world No 2 Petra Kvitova.

Piotr Wozniacki defeated Anastasia Rodionova, Anna Tatishvili, Monica Niculescu and Jelena Jankovic, all in straight sets, to reach the quarterfinals where she lost to the defending champion Kim Clijsters.

Piotr Wozniacki was the defending champion in Dubai and Indian Wells, but failed to defend either title, losing to Julia Gorges and Ana Ivanovic, respectively.

Piotr Wozniacki did not defend her title in Charleston as she was not allowed to participate under WTA rules because two top-6 players had already entered the draw.

Piotr Wozniacki reached the final but lost to Angelique Kerber, her first loss at the tournament since the start in 2010.

Piotr Wozniacki then played the French Open, where she lost to Kaia Kanepi in three sets in the third round.

Piotr Wozniacki represented Denmark at the Olympics as the eighth seed in the women's singles event.

Piotr Wozniacki was then defeated by the eventual champion Serena Williams in the quarterfinals.

Piotr Wozniacki, still suffering with the injury, was seeded eighth at the US Open, but did not advance past the first round.

Piotr Wozniacki lost in two sets to 96th-ranked Romanian Irina-Camelia Begu.

Piotr Wozniacki defeated Bojana Jovanovski, Daniela Hantuchova and Li Na, then lost to Agnieszka Radwanska in the quarterfinals.

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At the China Open in Beijing, Piotr Wozniacki defeated Chanelle Scheepers and Hsieh Su-wei but lost to Angelique Kerber in the third round.

At the year-end Tournament of Champions in Sofia, Piotr Wozniacki won her three group matches and reached the final but lost to Nadia Petrova.

In December 2012, during an exhibition match in Brazil, Piotr Wozniacki imitated friend and fellow tennis player Serena Williams by stuffing towels in her shirt and skirt in order to appear to be large-chested and have a large rear end.

Piotr Wozniacki began the year in Brisbane where as the eighth seed, she lost in the first round to qualifier Ksenia Pervak in three sets.

Piotr Wozniacki defeated Urszula Radwanska but lost to Kuznetsova in the second round.

At the Australian Open, Piotr Wozniacki defeated Sabine Lisicki, Donna Vekic and Lesia Tsurenko, but lost to Kuznetsova, this time in the fourth round.

In Dubai, Piotr Wozniacki defeated Lucie Safarova, Zheng Jie and Marion Bartoli to reach the semifinals where she lost to the eventual champion, Petra Kvitova.

Piotr Wozniacki then played in an exhibition match at the BNP Paribas Showdown in Hong Kong.

Piotr Wozniacki was scheduled to play Li Na, but she had to withdraw due to injury.

Piotr Wozniacki began the clay-court season by reaching the quarterfinals of the Family Circle Cup where she lost to Stefanie Vogele.

Piotr Wozniacki lost in the first round to Carla Suarez Navarro in Stuttgart, to Yaroslava Shvedova in Madrid, to Bojana Jovanovski in Rome, and to Zheng Jie in Brussels.

At the French Open, Piotr Wozniacki defeated Laura Robson in the first round, then lost again to Jovanovski in the second.

Piotr Wozniacki began her grass-court season at the Aegon International in Eastbourne.

Piotr Wozniacki reached the semifinals with victories over Tamira Paszek, Laura Robson and Ekaterina Makarova but then lost to qualifier Jamie Hampton.

Piotr Wozniacki received treatment but was visibly struggling and went on to lose the match.

Piotr Wozniacki was one of several players to slip and injure themselves, including Jo-Wilfried Tsonga, Victoria Azarenka and Maria Sharapova.

Piotr Wozniacki reached the semifinals beating Peng via retirement, Karin Knapp and Sloane Stephens, then lost to Simona Halep in straight sets.

At the US Open, Piotr Wozniacki defeated Duan Yingying and Chanelle Scheepers in straight sets, then lost to qualifier Camila Giorgi in the third round.

Piotr Wozniacki reached the quarterfinals with wins over Monica Niculescu and Sloane Stephens, but lost to the world No 1 and eventual champion Serena Williams.

Piotr Wozniacki ended her two-match losing streak against Bojana Jovanovski by defeating the Serb in a three set quarterfinal.

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Piotr Wozniacki then beat Wimbledon finalist Sabine Lisicki to reach the final and defeated Annika Beck of Germany in straight sets to win her first and only title of the year.

Piotr Wozniacki was scheduled to start the season in Brisbane but withdrew due to a right shoulder injury and instead began her season in Sydney where she defeated Julia Gorges in three sets, then lost to Lucie Safarova in the second round.

Piotr Wozniacki reached the fourth round following wins over Bojana Jovanovski and Yaroslava Shvedova, then lost to Jelena Jankovic, causing her to fall to world No 18, her lowest ranking since 2010.

Piotr Wozniacki recovered by reaching the quarterfinals of the Sony Open, recording wins over Monica Puig, Sloane Stephens and Varvara Lepchenko before losing to Li Na.

Piotr Wozniacki made her debut at the Monterry Open, where she defeated CoCo Vandeweghe, Kristina Mladenovic and Karolina Pliskova en route to the semifinals, then lost to the eventual champion Ana Ivanovic.

Piotr Wozniacki enjoyed a stellar grass-court season during which she made the semifinals of the Eastbourne International with wins over Samantha Stosur, Sloane Stephens and Camila Giorgi, then lost to the eventual finalist Angelique Kerber.

At the Wimbledon Championships, Piotr Wozniacki reached the fourth round for the fourth time in her career with straight-sets wins over Shahar Pe'er, Naomi Broady and Ana Konjuh, but ultimately lost to Barbora Zahlavova-Strycova.

Piotr Wozniacki won her first title of the year at the Istanbul Cup.

Piotr Wozniacki defeated Belinda Bencic, Karin Knapp, Karolina Pliskova, Kristina Mladenovic, and Roberta Vinci to secure the title.

Piotr Wozniacki progressed to the quarterfinals with straight-set wins over Daniela Hantuchova, Klara Koukalova and Shelby Rogers, then lost to top seed Serena Williams.

Piotr Wozniacki faced Magdalena Rybarikova in her opening match, progressing when her opponent was forced to retire early in the third set.

Piotr Wozniacki then beat qualifier Aliaksandra Sasnovich in the second round in straight sets.

Piotr Wozniacki was up a set when her opponent was forced to retire due to a severe heat-related illness, allowing Piotr Wozniacki to advance to her second Grand Slam final, and her first since the 2009 US Open.

Piotr Wozniacki then beat Casey Dellacqua and Timea Bacsinszky to reach the semifinals where she lost to Eugenie Bouchard in straight sets.

Piotr Wozniacki was eliminated by Samantha Stosur in her opening match of the tournament.

At the WTA Finals, Piotr Wozniacki was drawn into the White Group alongside Sharapova, Kvitova and Radwanska.

Piotr Wozniacki then went on to beat Agnieszka Radwanska in straight sets.

Piotr Wozniacki then beat Kvitova in straight sets going undefeated in her round robin matches.

Piotr Wozniacki then decided to run the New York City Marathon in November 2014.

Piotr Wozniacki recorded a time of 3 hours, 26 minutes and 33 seconds.

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Piotr Wozniacki claimed that the running training was positive for her and contributed to her good performances at the US Open and WTA Finals.

Piotr Wozniacki started her preparation for the Australian Open at the Auckland Open seeded as No 1 and advanced to the final, then lost to Venus Williams in three sets.

Piotr Wozniacki then competed at the Dubai Tennis Championships where she made it all the way to the semifinals, then lost to eventual champion Simona Halep in three sets.

Piotr Wozniacki rebounded at the Malaysian Open, winning the title by defeating Alexandra Dulgheru in the final in three sets.

Piotr Wozniacki then competed at the Miami Open beating Madison Brengle in the second round and Kaia Kanepi in the third round.

Piotr Wozniacki lost to Venus Williams in the fourth round in straight sets.

Piotr Wozniacki started her clay season in Stuttgart where she was seeded fourth.

Piotr Wozniacki lost to Angelique Kerber in the final in three sets, despite serving for the match in the third set.

Piotr Wozniacki lost in the quarterfinals to Maria Sharapova in three sets.

Piotr Wozniacki lost in the second round to Victoria Azarenka for the third time in straight sets.

Piotr Wozniacki beat Karin Knapp in straight sets, then lost to Julia Gorges in the second round in straight sets.

Piotr Wozniacki beat Jarmila Gajdosova in straight sets and Svetlana Kuznetsova in three sets to advance to the quarterfinals.

Piotr Wozniacki beat Andrea Petkovic in straight sets to advance to the semifinals where she faced Belinda Bencic.

Piotr Wozniacki retired from the match due to a back injury after losing the first three games.

Piotr Wozniacki beat Zheng Saisai, Denisa Allertova, and Camila Giorgi to advance to the fourth round and then lost to eventual finalist Garbine Muguruza in straight sets.

Piotr Wozniacki finally picked up her first win by crushing Alison Riske in the first round.

Piotr Wozniacki then beat Roberta Vinci in three sets, saving three match points in the third-set tiebreak, to advance to the quarterfinals.

Piotr Wozniacki breezed past Caroline Garcia, then lost in the semifinals to Petra Kvitova in straight sets.

Piotr Wozniacki easily beat Jamie Loeb in her opening match to advance to the second round where she was upset by Petra Cetkovska in a close three-set match despite having four match points.

Piotr Wozniacki began her Asian hard court swing at the Pan Pacific Open.

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Piotr Wozniacki then defeated Angelique Kerber in three sets in the quarterfinals.

Piotr Wozniacki lost to Anna Karolina Schmiedlova in the second round in three sets, despite being up a set and a break.

Piotr Wozniacki beat Bojana Jovanovski in the first round, and won ten games in a row to beat Qiang Wang to advance to the third round.

Piotr Wozniacki beat Mirjana Lucic-Baroni in three sets, then lost to Kirsten Flipkens in the second round in straight sets.

Piotr Wozniacki failed to qualify for the WTA Finals, but she did qualify for the Elite Trophy where she was drawn into Group D alongside Roberta Vinci and Svetlana Kuznetsova.

Piotr Wozniacki finished the year ranked at No 17, her worst year-end ranking since 2007.

Piotr Wozniacki began her 2016 season at the ASB Classic in Auckland, where she was defending finalist points.

Piotr Wozniacki beat Danka Kovinic, Christina McHale, and Alexandra Dulgheru to advance to the semifinals where she lost to eventual champion Sloane Stephens in straight sets.

Piotr Wozniacki lost to Dominika Cibulkova in the second round in straight sets.

Piotr Wozniacki next played the Qatar Open for which she needed nine match points to beat Ana Konjuh in the first round.

Piotr Wozniacki was at one point up by a double break in the third set.

Piotr Wozniacki then played Elena Vesnina in the third round, she fell in a grueling match.

Piotr Wozniacki played in the Monterrey Open instead of defending her title in Kuala Lumpur.

Piotr Wozniacki defeated Olga Govortsova in the first round and Mirjana Lucic-Baroni in the second round; however, she fell in the quarterfinals to the eventual winner Heather Watson.

Piotr Wozniacki was scheduled to play many clay court tournaments, but she injured her ankle during a practice, which put her out for all of the clay-court season.

Piotr Wozniacki won her first match in 10 weeks defeating Cagla Buyukakcay, but falling in yet another three-set match to Anett Kontaveit in the second round.

Piotr Wozniacki showed signs of improvement from her loss of form and injury, dismissing Alize Cornet and 7th seed Sam Stosur and dropping only seven games in the two matches, then lost in a three-set match to qualifier Monica Puig.

Piotr Wozniacki failed to win a match in the Connecticut Open as she lost in the first round to young Latvian Jelena Ostapenko.

Piotr Wozniacki slid past Taylor Townsend in three sets, then upset Svetlana Kuznetsova in round two.

Piotr Wozniacki then beat Monica Niculescu in two sets to reach the fourth round, in which she upended Madison Keys in two sets to reach the quarterfinals and then beat unseeded Anastasija Sevastova to enter the semifinals.

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Piotr Wozniacki cruised past her first two matches against CoCo Vandeweghe and Roberta Vinci before going head-to-head with Radwanska for the third time in three weeks.

Piotr Wozniacki won her second title of the season and 25th title overall at the Hong Kong Open.

Piotr Wozniacki defeated Zheng Saisai, Heather Watson, Wang Qiang, Jelena Jankovic, and Kristina Mladenovic.

Piotr Wozniacki ended the season with a run at the Luxembourg Open.

Piotr Wozniacki then was forced to retire in the quarterfinals due to sickness.

Piotr Wozniacki did not play at the WTA Elite Trophy and ended her topsy-turvy season ranked No 19.

Piotr Wozniacki started out strong, breezing past Nicole Gibbs and Varvara Lepchenko, then lost in the quarterfinals to Julia Gorges in three sets, despite being up a set and a break.

Piotr Wozniacki played some solid tennis against Olympic gold medallist Monica Puig, winning in three sets.

Piotr Wozniacki then defeated Yulia Putintseva in straight sets in a rematch of their 2016 Australian Open first-round clash.

Piotr Wozniacki reached the third round, defeating Arina Rodionova and Donna Vekic, but lost to Johanna Konta in straight sets.

Piotr Wozniacki played at the Qatar Open sliding past Kiki Bertens and Agnieszka Radwanska in the first two rounds in straight sets.

Piotr Wozniacki then saved two set points in the first set to beat Lauren Davis, before dispatching Monica Puig to reach the final.

At the Indian Wells Open, Piotr Wozniacki beat Magda Linette, Katerina Siniakova and Madison Keys, not losing a set, to advance to the quarterfinals where she lost to Kristina Mladenovic.

Piotr Wozniacki began her clay court season at the Charleston Open.

Piotr Wozniacki made it to the quarterfinals with straight-set wins over Annika Beck and Anastasia Rodionova.

Piotr Wozniacki next played at the Prague Open, beat Misaki Doi in the first round in straight sets, and lost to Ostapenko again in three sets despite having match point.

In Strasbourg, Piotr Wozniacki retired from her first match against Shelby Rogers.

Piotr Wozniacki beat Jaimee Fourlis in the first round in three sets, then beat Francoise Abanda without the loss of a game.

Piotr Wozniacki lost to eventual champion Jelena Ostapenko for the third time in three sets.

Piotr Wozniacki began her grass-court season at the Eastbourne International with straight-set wins over Naomi Osaka and Elena Vesnina.

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Piotr Wozniacki beat Timea Babos in three sets, recovering from a break down and grass court specialist Tsvetana Pironkova in straight sets.

Piotr Wozniacki then beat Anett Kontaveit in a come-from-behind three-set win which saw Kontaveit fail to serve for the match twice to advance to the fourth round for the sixth time.

Piotr Wozniacki competed in the Swedish Open and she made her fifth final of the year, beating Pauline Parmentier, Viktorija Golubic, Kateryna Kozlova and Elise Mertens before falling to Katerina Siniakova in the final.

Piotr Wozniacki began her hard-court season in Rogers Cup in Toronto.

Piotr Wozniacki eventually made her sixth final of 2017 yet again falling at this stage, this time to Elina Svitolina.

Piotr Wozniacki then competed in the Cincinnati Open defeating Elena Vesnina and Ashleigh Barty before falling in the quarterfinals to world No 1 Karolina Pliskova.

Piotr Wozniacki then played at the Pan Pacific Open, where she successfully defended her title by defeating Shelby Rogers, Dominika Cibulkova, Garbine Muguruza and Anastasia Pavlyuchenkova.

At the WTA Finals, Piotr Wozniacki beat Elina Svitolina for the first time after losing to her twice in finals.

Piotr Wozniacki then defeated the world No 1, Simona Halep, in straight sets.

Piotr Wozniacki began her season at the Auckland Open for the fourth straight year.

Piotr Wozniacki was the top seed and advanced into the final successfully, but she was defeated by the same opponent she lost to the previous year in the quarterfinals, Julia Gorges, in straight sets.

Piotr Wozniacki then beat Kiki Bertens and Magdalena Rybarikova both in straight sets to reach the quarterfinals.

Piotr Wozniacki defeated Anastasia Potapova, then lost to Daria Kasatkina in the quarterfinals.

Piotr Wozniacki then played the Qatar Open and reached the semifinals by defeating Carina Witthoft, Monica Niculescu and Angelique Kerber.

Piotr Wozniacki then played the Indian Wells Open, for which she received a bye in the first round.

Piotr Wozniacki defeated Lara Arruabarrena and Aliaksandra Sasnovich in straight sets and three sets respectively, then lost to eventual finalist Daria Kasatkina again in the fourth round.

Piotr Wozniacki began her clay court swing at the Istanbul Cup where she made the quarterfinals defeating Ekaterina Alexandrova and Sara Errani before retiring against Pauline Parmentier.

Piotr Wozniacki then played in the Madrid Open where she easily beat Daria Gavrilova and escaping Ashleigh Barty, then lost to the eventual finalist Kiki Bertens in straight sets.

Piotr Wozniacki played at Eastbourne, where she went one better than last year winning the title; she convincingly beat Camila Giorgi in round two.

Piotr Wozniacki then went on to save a match point to outlast Angelique Kerber to make her 53rd WTA final.

At Wimbledon, Piotr Wozniacki lost in second round to Ekaterina Makarova, after saving five match points.

Piotr Wozniacki was scheduled to start her 2018 US Open Series in Washington, but withdrew due to a right leg injury.

Piotr Wozniacki entered the WTA Finals as second seed and defending champion, and was drawn in the White Group.

Piotr Wozniacki was upset in straight sets in her first round robin match by seventh seed Karolina Pliskova, then defeated fourth seed Petra Kvitova in three sets.

Piotr Wozniacki was then defeated in three sets by sixth seed Elina Svitolina, ending her title defense.

Piotr Wozniacki began her season at the Auckland Open for the fifth straight year, but she was upset in the second round by Bianca Andreescu.

Piotr Wozniacki ended her season without winning a title for the first time since 2007.

On 6 December 2019, Piotr Wozniacki announced that she would retire from professional tennis after the 2020 Australian Open in January.

Piotr Wozniacki reached the semifinals of the 2020 Auckland Open, beating Paige Hourigan, Lauren Davis and Julia Gorges, before losing to eventual runner-up Jessica Pegula in the semifinals.

Piotr Wozniacki bowed out in the third round in a loss to Tunisian Ons Jabeur.

Piotr Wozniacki was a defensive baseliner, known for her counterpunching style of play; upon her retirement in 2020, she was described by The Guardian as "one of the most defensive players to ever reach No 1".

Piotr Wozniacki's backhand was hit flat, and was noted for its consistent depth, pace, and penetration; she was known for her backhand down-the-line.

Piotr Wozniacki's forehand showed no significant improvements throughout her career; this was attributed to her stubborn refusal to drop her father, Piotr Wozniacki, as her coach.

Piotr Wozniacki's second serve was notably weaker, and was frequently attacked by aggressive returners.

Piotr Wozniacki was known for her return game, neutralising powerful first serves and attacking weak second serves; this allowed her to dominate play from a defensive position.

Piotr Wozniacki stated that she preferred hard and grass courts; she liked hard courts due to the regularity of the bounce, whereas the fast pace of grass courts allowed her to defend effectively.

Piotr Wozniacki disliked clay courts, as she found sliding awkward, and felt that the slow pace inhibited her movement.

Piotr Wozniacki experienced her greatest success on hard courts, where she won 24 of her 30 singles titles.

Piotr Wozniacki was briefly coached by Ricardo Sanchez and Thomas Johansson.

In 2007, Piotr Wozniacki signed an endorsement deal with Adidas, who sponsored her for clothing, footwear, and apparel throughout her career; she previously wore Nike clothing and footwear.

Piotr Wozniacki wore her first 'Adidas by Stella McCartney' tennis dress at the 2009 US Open, and would go on to wear McCartney's designs throughout the rest of her career.

Piotr Wozniacki is close friends with Serena Williams, Agnieszka Radwanska, and Angelique Kerber.

Piotr Wozniacki is a keen football fan and an avid supporter of Liverpool FC.

Piotr Wozniacki was in a relationship with Northern Irish professional golfer Rory McIlroy from 2011 until 2014.

Piotr Wozniacki announced their engagement via Twitter on 1 January 2014.

On 14 February 2017, Valentine's Day, Piotr Wozniacki revealed on her social media accounts that she was in a relationship with former NBA basketball player David Lee, later being confirmed by her family.

Piotr Wozniacki married Lee on 16 June 2019 at the luxury resort of Castiglion del Bosco, which is near Montalcino in Tuscany.

On February 10,2021, Piotr Wozniacki announced on her Instagram account that she is expecting her first child, a girl, in June.

On June 19,2022, Piotr Wozniacki announced on her Instagram account that she is expecting her second child.

In October 2018, Piotr Wozniacki announced that she was diagnosed with rheumatoid arthritis and that she would like to become a role model for people who have the condition.

Piotr Wozniacki was diagnosed with the auto-immune disease before the 2018 US Open, but was able to play through it.

Piotr Wozniacki did suffer a drop in results after her diagnosis, until bouncing back by winning the 2018 China Open in Beijing without dropping a single set.

At the Rogers Cup Piotr Wozniacki led by a set and a break before Williams came back to win it.

Piotr Wozniacki visited Williams during her recovery from injury in 2011.

Piotr Wozniacki received a call from her best friend Williams then in time of need.

Piotr Wozniacki then won the next two meetings to tie the head-to-head.

Piotr Wozniacki snapped the losing streak by beating Sharapova in three sets at the 2014 US Open and would go on to the reach the final.

Piotr Wozniacki then took a four-match winning streak over Halep, beginning at the 2015 Stuttgart Open and including their most recent meeting at the 2018 Australian Open in the final, where she defeated Halep in three sets to win her first Grand Slam title and snatch the world No 1 position from Halep.

At the semifinal stage of the 2017 WTA Finals, Piotr Wozniacki won a marathon first set propelling her to a straight sets victory over Pliskova, and eventually lifting the title.