Cardiff's Jay Bothroyd has claimed fellow striker Michael Chopra was racially abused by a Crystal Palace player.
The two sets of players became involved in a melee after the game at the Cardiff City Stadium ended 1-1.
They had to be separated but the trouble reportedly continued in the tunnel and Bothroyd has alleged there was a racist comment made.
He says the problems started when a Palace player said something unacceptable to Chopra - who is of Indian descent.
"I wasn't there but I spoke to Chops and he said one of their boys made a racist comment to him," Bothroyd told Wales Online.
"That is obviously not acceptable in this game and it's something I think the referee might have to deal with.
"We were wearing T-shirts today that said 'Kick Racism Out Of Football' and then something like that happens.
"It's not a good example to set for football in general.
"If you call someone a racist name people are going to react and that's happened at the end."