Footage has emerged on YouTube showing AC Milan's Ghanaian midfielder, Kevin-Prince Boateng, kicking the football at fans for racially abusing him.
Boateng then leads his team off the field of play. Milan were playing Aurora Pro Patria who play in Italy's fourth tier, in a friendly fixture.
Gazzetta dello Sport contributor Tancredi Palmeri has tweeted that the Pro Patria club owner said: "Those people singing racist chants vs Boateng aren't part of our ultras. It's up to authorities to tackle these episodes"
AC Milan's midfielder Riccardo Montolivo tweeted: "In 2013 this is still happening...So sad for all families at the stadium, sympathy for my teammates #shame."