AC Milan forward Mario Balotelli was reportedly subjected to insults and racial taunts from Inter fans during the Milan derby on Sunday night.
Inter supporters waved inflated bananas and whistled at Balotelli during the 1-1 draw at the San Siro.
However Balotelli, who played for Inter between 2006 and 2010, helping them to a treble in his final season with the team, kept his composure and responded simply by holding a finger to his mouth during the second half.
Balotelli has already scored four times since joining Milan from Manchester City last month but he failed to find the target on Sunday.
The 22-year-old had three chances in the derby, drawing a great save from Samir Handanovic at one point with a header.