Clarence Seedorf's men have lost three games in a row and Rossoneri fans, angered by recent poor performances, gathered ahead of Sunday's Parma match
The Rossoneri have lost three consecutive games heading into Sunday's clash with Parma - 2-0 at home to Juventus a fortnight ago, 1-0 at Udinese last weekend and 4-1 to Atletico Madrid in midweek as they exited the Champions League with a whimper.
Shortly before 13:00 CET - with kick-off scheduled at 15:00CET - supporters began surrounding the stadium in Milan with chants such as “sh*t team” and “you'll leave the stadium at midnight”.
The protest, which has so far been totally peaceful, was organised by ultras situated in Curva Sud with out-of-sorts striker Mario Balotelli and CEO Adriano Galliani drawing much of their ire.
Milan's squad arrived at the ground via an alternate route to avoid contact with the crowd outside San Siro.
Roberto Donadoni's Parma will be a tough team for the Clarence Seedorf's men to beat once again - the visitors have not lost in Serie A since November 2 having taken points off the likes of Napoli, Roma, Inter and Fiorentina in the process.