Buriram United moved to the top of the Thai Premier League with a 2-1 victory over Ratchaburi on Sunday.
The hosts went ahead in the 50th minute through Javier Patino but Brazilian striker Douglas immediately hit back for Ratchaburi.
Carmelo Gonzalez's second-half strike proved to be decisive as the visitors were unable to find an equaliser, before goalscorer Douglas was sent off with two minutes remaining.
Muang Thong United slipped into second place due to Buriram's win as they failed to find a winning goal at home to Osotspa.
Chonburi climbed into third place after a thrilling seven-goal game with Chiangrai United. The visitors were 4-1 up with just over an hour played but Brazilians Antonio Claudio and Jerri Farias clawed back late goals to ensure a nervy finish.
Elsewhere, Pattaya United remained in the relegation zone after a 3-1 defeat the hands of Songkhla United, with second-half goals from Elvis Job and Aron da Silva enough to secure the points.
On Saturday, Police United came from behind to win 3-2 at Army United, after Bjorn Lindemann had given the visitors a two-goal lead inside 30 minutes.
Adul Meansaman pulled one back just after half-time and Thana Chanaboot equalised for the hosts in the 71st minute. Police midfielder Paitoon Nontadee completed the comeback with a winning strike two minutes from time.
BEC Tero Sasana claimed their third straight league victory with three points at Samut Songkhram, thanks to Sariff Sainui’s early goal and a 48th-minute free-kick from Brazilian striker Cleiton Silva.
Suphanburi continued their impressive league run with a 0-0 draw against the in-form Bangkok Glass at LEO Stadium. The visitors were the better side in the second half but striker Birame Diouf wasted a great opportunity to break the deadlock in the 71st minute as he fired over from close range.
Meanwhile, top-six contenders TOT and Chainat shared the points in a goalless draw at the Khao Plong Stadium.