Gonzalo Higuain scored twice as Napoli came from behind to beat AC Milan 3-1 and reinforce its bid for a Champions League place after Fiorentina's earlier victory over Atalanta in Serie A on Saturday.
Third-place Napoli remained three points ahead of Fiorentina, which won 2-0.
"We played with high intensity and skill, at a very high level," Napoli coach Rafa Benitez said. "Higuain is making the difference but his teammates helped him a lot.
"It happens that you make mistakes in some matches but today we saw a team that is growing."
Adel Taarabt took less than eight minutes of his Serie A debut to fire Milan in front, racing half the length of the pitch before curling a wonderful finish into the bottom right corner.
Gokhan Inler levelled three minutes later with a deflected effort into the top right corner.
Higuain had an effort ruled marginally offside and Cristian Maggio hit the post as Napoli threatened to take the lead on several occasions.
The home side finally made the most of its opportunities 11 minutes after halftime when Higuain, who had been threatening all night, headed home a delightful cross from Inler.
The Argentine doubled his tally eight minutes from time to take his season tally to 16 in all competitions.
Shortly beforehand, Mario Balotelli broke down in tears on the bench after being substituted off following a below-par performance from the Italy striker.
"Everyone expresses emotions in that way," Milan coach Clarence Seedorf said. "It's not the first time it's happened to a player. It was a particular moment for him. It's happened to me before, too."