City's defenders back off now as New Zealand youngster Marko Stamenic carries the ball unopposed before dragging his shot well wide from 25 yards.
AC Milan make one change from the 11 that began the 2-0 home win against Juventus at the weekend as Rade Krunic comes in for Tommaso Pobega.
That means forward Olivier Giroud, who won the Champions League, Europa League and FA Cup during a four-season spell with Chelsea, starts against his former team, while ex-Chelsea defender Fikayo Tomori also plays.
AC Milan XI: Tatarusanu, Hernandez, Tomori, Gabbia, Kalulu, Tonali, Bennacer, Leao, Diaz, Giroud.