The Milan coach believes that the 23-year-old forward can form a prolific partnership with new signing Alessandro Matri provided his attitude remains right.
The Italy international has been a big hit at San Siro since arriving from Manchester City in January, with the forward's goals having played a key role in securing a place in this season's Champions League.
The enigmatic 23-year-old cut a frustrated figure during the midweek win over Celtic, having been forced wide in order to accommodate new signing Alessandro Matri up front, but Allegri feels that Balotelli and the strike partnership will come good as long as the Palermo native maintains the right attitude.
"Balotelli sacrificed himself a lot for the team in the last game with Matri," the Rossoneri boss told reporters on Saturday. "It’s his first year that he’s always on the starting lineup and he has to improve from a mental point of view as now he’s the main player we have and he has to show on the pitch every three days that he’s the best.
“Matri runs hard up front and Balotelli finds more space because of that. The longer the game goes on, the more the teams will stretch and that makes it easier to Mario to find space. The understanding between the two is good and it’ll get better with time. We shouldn’t forget that it was the first game that they played together."
Allegri was speaking on the eve of Sunday's mouth-watering matchup with Napoli at San Siro. Marek Hamsik is arguably the Partenopei's principal threat but Allegri insists he is no longer disappointed that the Rossoneri failed in their pursuit of the Slovakian attacker last summer.
“Hamsik is not a regret," he stated. "He’s a player with great quality and can still improve a lot. I liked him even when he was playing for Brescia. He’s an international level player with technique, strength and even has a great character.”