Uefa has started disciplinary proceedings against Russian side CSKA Moscow for the "racist behaviour of their fans" during their home Champions League match against Manchester City.
City midfielder Yaya Toure said after the match he was "furious", claiming he was the target for racist abuse by home fans during Wednesday's match.
He said he told the referee about the chants both during the game, and afterwards. CSKA Moscow say there's no evidence for the accusations.
CSKA 'should be banned' - Toure
Toure said: "I'm very, very disappointed about what those fans have done. I think Uefa has to take action because players with the same colour of skin will always be in the same position."
"For me, as captain, I was wearing an armband which said 'No to racism' and I was totally disappointed."
He said the stadium should be banned for months or even years as a punishment.
"We have to be as strong as possible otherwise they will continue like that. Too much is too much. We have to stop it now," he continued.
But CSKA are "surprised and disappointed" by Toure's claims.
A club statement read: "Having carefully studied the video of the game, we found no racist insults from fans of CSKA."
Russia is due to host the World Cup in 2018 and there are calls for the government there to put a stop to racist incidents such as this.
Anti-racism in football organisation Kick it Out has called for the referee to be banned too, saying "he failed to do his duty last night".
Head of Kick it Out Lord Ousley said: "Firstly, why did the ref not do his job which was to stop the game and to make sure that problem was dealt with?"
In May, Uefa announced that it would fine clubs and close stadiums for racist incidents involving spectators with a partial stadium closure for the first offence and a full stadium closure for a second.