Balotelli returns from suspension for the Sunday night clash with Catania, as Milan aim to end a run of two points from three rounds.
"I hope Mario can give us a hand, as since he arrived his presence has always been felt," said Allegri.
"In psychological terms, it would be very important for us to win. It won't be easy, as Catania have always done well this season and still hope to reach the Europa League. I think tomorrow will be fundamental for third place.