The midfielder lasted the entire duration as a Mauro Icardi settled the game with a dramatic late winner.
The 222nd Milan derby was heading for a stalemate before the Argentine striker headed in Matias Vecino's cross.
Inter - who lost Radja Nainggolan to a first-half injury - were deserved winners, but it was a lackluster game.
The closest either side came before the winner was Inter's Stefan de Vrij hitting the post from close range.
Icardi - who only touched the ball 15 times in the entire game - and AC Milan's Mateo Musacchio both had goals correctly disallowed for offside.
Inter move up to third with the victory - with AC Milan remaining 12th. Read Full Story