Chelsea loanees Victorien Angban and Joao Rodriguez both featured as Sint-Truiden were beaten 1-0 by OH Leuven in the Belgian Pro League on Sunday.
Angban started and picked up a yellow card before being replaced by Rodriguez in the 80th minute.
Cristian Cuevas, who is also on loan at Sint-Truiden from Chelsea, was an unused substitute in the fixture.
Former Tottenham and Crystal Palace midfielder John Bostock also appeared in the match, being replaced in the 74th minute for Leuven, who now sit 12th on the Belgian top flight table after gaining promotion last season.