Milan have been linked with a summer move for Belotti, who worked with Gattuso at Palermo for a short spell.
Ahead of tonight's clash, Gattuso recalled: "I only trained him for 20 days, but I always said that after (Andriy) Shevchenko, he is the striker who has impressed me the most.
"If he shoots at the goal 30 times, 28 times he scores, he is physically strong and clever.
"He is complete. And he's a good guy."