The Rossoneri ran rampant in a particularly heated and bad tempered affair that saw Roberto Mancini dismissed.
Goals from Alex, Carlos Bacca and M'Baye Niang were enough for AC Milan to down city rival 3-0 Inter in Sunday's fiery Derby della Madonnina.
There was drama aplenty as the Rossoneri snatched what could be a crucial result in their race for Champions League qualification.
Sinisa Mihajlovic's men were certainly helped by Inter's implosion, however, as coach Roberto Mancini was sent off before captain Mauro Icardi conspired to miss his spot kick.