Dries Mertens came off the bench to grab the winner as Napoli rallied from 2-0 down to beat visiting AC Milan 3-2 and seize a second victory in two matches.

It meant that Carlo Ancelotti got the better of Milan counterpart Gennaro Gattuso, who used to play under the new Napoli coach when he was with the Rossoneri.

After Giacomo Bonaventura (15 minutes) and Davide Calabria (49) took advantage of questionable goalkeeping from David Ospina to give Milan a 2-0 lead, Piotr Zielinski scored twice before Mertens was left unmarked to tap the ball in 10 minutes from time.