Buriram have made a poor start to their title defence, having collected just four points from as many matches this season.
They sit in the bottom half of the table after an excellent performance from Bangkok Glass, who moved up second with their win.
Leandro's stunning start to the season continued as he helped Singhtarua claim a 2-2 draw at Bangkok United on Sunday.
The Brazilian midfielder has been the competition's star man in the first four rounds of competition and another excellent performance saw newly promoted Singhtarua come from behind to win a point.
Singhtarua sit fifth in the table after Leandro scored in both halves of the draw, with the 31-year-old's brace giving him six goals for the season, enough to top the league's scoring charts.
