Milan have not been beaten in the league since before Christmas and have won five of their last six, including last weekend's 1-0 win over Chievo Verona.
Milan occupy the final Champions League spot and have a six-point cushion over their fourth-placed hosts in the table.
Montella welcomes back Borja Valero following suspension, however Stefan Jovetic misses the game through injury and Gonzalo Rodriguez is suspended. Luca Toni is expected to start up front in Jovetic's absence.
AC Milan: LLDLDL
Possible starting lineups
Fiorentina: Viviano; Pasqual, Compper, Savic, Tomovic; Aquilani, Pizarro, Valero Ljajic, Cuadrado; Toni
AC Milan: Abbiati; Sciglio, Zapata, Mexes, Abate; Flamini, Montolivo, Muntari, Boateng, El Shaarawy; Balotelli
Sports Mole says: 1-1