The Italian has made a huge impact at the San Siro, scoring four goals in his first three games so far for the club.
"I am playing at a consistent level and nearing my best form," the 22-year-old told Sky Sport Italia after the game.
Balotelli had a heated discussion with youngster M'Baye Niang before his set piece, ushering the visibly angry Frenchman away from the ball. The former Manchester City man explained the situation to reporters.
"I had already missed two free kicks. But I said to him that if I missed his one, he could have a go."
The Rossoneri have moved up to third place in Serie A after securing all three points.