Napoli moved seven points clear at the top of Serie A with a clinical 2-0 win over AC Milan.

Former Inter Milan striker Romelu Lukaku made an immediate impression on his return to the San Siro, opening the scoring after five minutes when he outpaced Strahinja Pavlovic in the penalty area before firing into the bottom corner.

Despite a response from Milan, who tested Napoli goalkeeper Alex Meret a few times, Khvicha Kvaratskhelia doubled the visitors’ lead minutes before half-time.

The Georgia international launched one of his trademark maze attacks down the left wing, cutting past several defenders before unleashing a curling drive beyond the hands of Mike Maignan.

Immediately after the restart, the home side appeared to have halved the deficit through Alvaro Morata, but his header was disallowed for marginal offside.

The victory puts Antonio Conte’s side on 25 points, seven points ahead of Inter Milan in second place.

A third defeat of the season leaves AC Milan in eighth place, eleven points off the pace.