"Pato has to stay calm. This season he is playing in a different way, plus he was out injured for a long time," explained Allegri.
"Cassano may be a little bit behind in terms of match fitness, but he has already shown his talent and is an excellent buy. Pato finishes off moves, while Cassano tends to put others in the position to score.
"Cassano can change a game. We have signed an extraordinary player and he has to keep on working hard."