Valencia responded in a bizarre manner to allegations from Carlo Ancelotti of their fans racially abusing Real Madrid star Vinicius Junior.
Los Che secured a crucial 1-0 victory over Los Blancos, as they battle to avoid La Liga relegation this season, but off-field issues overshadowed the game.
Match referee Ricardo de Burgos Bengoetxea controversially sent off Vinicius in added time, mere minutes after the forward lodged a complaint about racist abuse from the home fans.
Valencia director Javier Solis claimed that Ancelotti had mistakenly labeled the Mestalla fans as racist and appeared to support the notion that there was a misunderstanding.
Solis stated that the club would strive to identify an individual involved in racist chanting but dismissed the idea of widespread abuse.