Description:AC Milan walked off the pitch during a friendly match at Italian fourth-tier side Pro Patria on Thursday (January 3) in protest at racist chanting by the home fans, causing the game to be abandoned after less than half an hour. "Milan left the pitch following racist insults on the part of a minority of the Pro Patria fans directed at (Kevin-Prince) Boateng, (M'Baye Niang, (Urby) Emanuelson and (Sulley) Muntari," the club said on their website.(1:55)