The striker, 16, has already made his Serie A debut this season.
Pioli said: "Who is he like? I don't like comparisons so much because each player has his own characteristics, and now it's too early for him.
"He's following the right path, with the right attitudes, let's make him grow. We've made him do something extra, exceptional, but because there was a particular situation...
"It's right that he follows his path. I'm sure he has the qualities to be Milan's centre forward one day."