Despite his claims, CSKA have suggested that Toure has misunderstood what he heard after going through all video evidence.
A statement from the Russian outfit said: "Having carefully studied the video of the game, we found no racist insults from fans of CSKA. In many occasions, especially during attacks on our goal, fans booed and whistled to put pressure on rival players, but regardless of their race.
"In particular, this happened with Alvaro Negredo and Edin Dzeko. Why the Ivorian midfielder took it as all being directed at him is not clear."
City are said to be poised to lodge an official complaint to UEFA regarding the incident.