The Rossoneri moved up to siyth in Serie A following their only second win against Fiorentina in the last 10 attempts. Scorers for AC Milan were Carlos Bacca and substitute Kevin-Prince Boateng who finished a deal at San Siro in the 88th minute, easing the pressure off their manager Sinisa Mihajlovic.
The Rossoneri before facing Inter, will play against Empoli next week, while Fiorentina will play against Torino in the next round.
MILAN SUBS: De Sciglio, Mauri, Poli, Zapata, Simic, Kucka, De Jong, Balotelli, Boateng, Calabria, Livieri, Abbiati.
MILAN (4-4-2): Donnarumma; Abate, Alex, Romagnoli, Antonelli; Honda, Montolivo, Bertolacci, Bonaventura; Niang, Bacca.
FIORENTINA SUBS: Gilberto Junior, Fernandez, Blaszczykowski, Verdu, Rossi, Pasqual, Lezzerini, Babacar, Sepe, Baez.
FIORENTINA (3-4-2-1): Tatarusanu; Tomovic, Roncaglia, Astori; Bernardeschi, Mario Suarez, Vecino, Marcos Alonso; Ilicic, Borja Valero; Kalinic.