The 2021–22 Thai League 1 is the 25th season of the Thai League 1, the top Thai professional league for association football clubs, since its establishment in 1996, also known as Hilux Revo Thai League due to the sponsorship deal with Toyota Motor Thailand. A total of 16 teams will compete in the league. The season began on 31 July 2021 and is scheduled to conclude in May 2022.[1]
The 1st transfer window is from 4 May to 27 July 2021 while the 2nd transfer window is from 8 December 2021 to 4 January 2022.
There are 16 clubs in the league, with three promoted teams from Thai League 2 replacing the three teams that were relegated from the 2020-21 season.
Sukhothai, Trat and Rayong were relegated at the end of the 2020–21 season after finishing in the bottom three places of the table. They were replaced by 2020-21 Thai League 2 champions Nongbua Pitchaya. They were joined by runners-up Chiangmai United, who also got promoted for the first time and Khonkaen United, promotion playoff winner which was first held in 2020–21 season.
Updated to match(es) played on 4 May 2022. Source: Thai League Rules for classification: 1) Points; 2) Head-to-head points; 3) Head-to-head goals difference; 4) Head-to-head goals scored; 5) Overall goals difference; 6) Overall goals scored; 7) Fair play points; 8) Play-off without extra time;). (C) Champions; (Q) Qualified for the phase indicated; (R) Relegated
Positions by round
The table lists the positions of teams after each week of matches. In order to preserve chronological evolvements, any postponed matches are not included in the round at which they were originally scheduled, but added to the full round they were played immediately afterwards. For example, if a match is scheduled for matchday 13, but then postponed and played between days 16 and 17, it will be added to the standings for day 16.
^Fastest hat-trick in Thai league history at 9 minutes. Ikhsan's 4 goal haul in 11 minutes placed him only 2nd in the fastest goal hauls of the 21st century in top flight league football ahead of Kylian Mbappé's 13 minutes against Olympique Lyonnais in 2018, who also scored 4, and behind Robert Lewandowski's 5 goals in 9 minutes (Lewandowski scored his 4th goal by the 6th minute) against VfL Wolfsburg in 2016.[20]