Espanyol boss Mauricio Pochettino was furious with the officials after his side lost 2-1 to Valencia at Mestalla.
A last minute penalty saw Los Che gain all three points against the nine-man visitors, and the 40-year-old has admitted that they may make a complaint in the days to come.
“Everyone makes mistakes,” he told a Press conference. “Even referees. But I think we need to be treated with some respect.
“The game has gone, the points will not come back, but things have happened tonight that are beyond our control.
“I believe that the club should make an official complaint.”