FIFA president Sepp Blatter says he is 'saddened' by racism in the game after England Under-21 players suffered abuse in the match against Serbia.
Defender Danny Rose was subjected to monkey chants during England's 1-0 win in Krusevac on Tuesday, while scuffles broke out between fans, players and coaching staff after the final whistle.
The Football Association reported "a number" of racist incidents to UEFA after the game but the Serbian FA have emphatically denied any racism.
They also denounced Rose for "inappropriate and vulgar" behaviour following his controversial sending off for angrily kicking the ball away in response to the abuse after the game had ended.
Blatter took to Twitter on Wednesday afternoon to speak out against racism in the game, highlighting FIFA's anti-racism campaign, but the 76-year-old avoided commenting directly on Tuesday night's events.
He said: "Saddened every time I hear about racist incidents in football.
"We must keep fighting to eradicate discrimination from our sport. Kick racism out of football."