Manachai was originally from Buriram, in the north-eastern Isaan region of Thailand, now fighting out of YOKKAOSaenchaiGym in Bangkok.
25 Facts About Manachai
Manachai started training and fighting at the age of 8.
Manachai won his first fight and was rewarded with 500 baht.
Manachai joined Kiatmoo9 Gym in Buriram, training with the camp's fighters like Singdam, Superlek and Rungnarai for many years.
Manachai appeared on the program together with YOKKAO camp mates, Singdam and Saenchai.
Manachai sustained losses at YOKKAO 21 to Australian Kurtis Staiti, as well as in Korat and Omnoi Stadium.
Manachai kicked off the series of victories when he went up against former 2013 Rajadamnern champion, Kiatpetch Suanaharneekmai at the YOKKAO Next Generation event in Suraburi.
On 20 August 2017, Manachai appeared on the inaugural All-star Fight promotion alongside YOKKAO teammate, Pakorn and Muay Thai star, Buakaw.
Manachai defeated Noukhith a minute into the third round via an elbow KO.
Manachai continued his win streak at his next 2 appearances.
The first on 17 November 2017 in Surin, Manachai won the fight in round 3 via low-kick KO.
Manachai won the fight via referee stoppage in round 1.
On 18 February 2018, Manachai fought against Lumpinee Champion Pongsiri PKSaenchaiGym at Channel 7 stadium.
Manachai outperformed his opponent in the decisive rounds 3 and 4 to take the win over decision.
On 24 March 2018, Manachai took on Attachai Tor Morsi at Siam Boxing Stadium broadcast live on Channel 3.
Manachai ended the fight in round 1 and won via low-kick KO.
On 18 April 2018, Manachai took his 10th straight win when he returned to Italy for the Parabellum promotion against Christian Zahe.
Manachai won the fight over unanimous decision after 3 rounds.
On 29 April 2018, UK fighter Mo Abdurahman concluded Manachai's winning streak at YOKKAO Next Generation Southampton with a round-3 KO via right hook.
In May 2018, Manachai was announced as a member of the All Star Fight Dream Team that features other prominent fighters such as Buakaw Banchamek, Yodsanklai Fairtex, Superbon Banchamek, Saeksan Or.
On 21 May 2018, Manachai faced Canadian fighter, Abdou Haddad on All Star Fight 4 held in Hong Kong.
Manachai won the fight via decision after 3 rounds, which was featured on Fox Sports Asia's Facebook page.
On 29 October 2018, Manachai took on Julio Lobo from Brazil for the WBC Muay Thai World Welterweight title at YOKKAO 34.
On 17 December 2019, Manachai fought Trithep LSM99Max for the WMO world championship title at Lumpinee Stadium.
Manachai won the fight via round-4 KO to be crowned the new WMO world champion 147lbs.