AC Milan’s Ghanaian forward Prince Kevin Boateng, wearing a jersey against racism, warms up prior to an Italian Serie A football match between AC Milan and Siena on January 6 , 2013 at the San Siro stadium in Milan. Boateng was subjected to racist taunts by Pro Patria fans during a friendly on January 3 and the German-born Ghanaian forward responded by storming off the pitch in protest followed by his Milan teammates. AFP PHOTO / ALBERTO PIZZOLI (Photo credit should read ALBERTO PIZZOLI/AFP/Getty Images)