Napoli returned to the Serie A summit as Giovanni Simeone's 78th-minute header sealed a 2-1 win over previously unbeaten Milan at San Siro on Sunday.

Milan had 11 shots to Napoli's three in a dominant first half, but the visitors went ahead shortly after the break when Matteo Politano stroked home from 12 yards following Sergino Dest's clumsy foul on Khvicha Kvaratskhelia.

Olivier Giroud pulled Milan level in the 69th minute, but substitute Simeone popped with the winner to seal a huge victory for Luciano Spalletti's side, who remain unbeaten in the league this season.

The result means Napoli leapfrogged Udinese and Atalanta at the top of the table, while Milan dropped down to fifth after a first Serie A defeat in 23 games.