Following the incident, calls have been made for black players to boycott the global tournament due to be held in the country in five years' time.
"I think it's very sad it happened again," BBC Sport quotes Boateng as saying. "It was in Russia so I understand his reaction and yes we must look to it because it's not the way.
"We will see there's plenty of time to 2018 but yeah we must look for that. We are here to play football and people in the stadium to enjoy the game and not for this. I can't say now [about a boycott] but we will see how it is in 2018."
UEFA have opened disciplinary proceedings against CSKA following the incident.