Victor Osimhen has hit his 10th Serie A goal since the turn of the year as leaders Napoli stretched their advantage to 18 points by winning 2-0 at Empoli.

The Nigerian has scored in his last eight domestic league games, with his efforts bringing a long-awaited Scudetto ever closer.

An early own goal from Ardian Ismajli gave Napoli a strong start, and Osimhen soon doubled the lead with an easy finish.

The victory on the road was tarnished by Mario Rui petulantly kicking out at Francesco Caputo and receiving a red card following a VAR check, but with games running out the Naples giants are looking unstoppable.

Elsewhere on Saturday, Sassuolo won 1-0 at Lecce to join them on 27 points in mid-table.

Earlier in Tuscany, a 17th-minute breakthrough arrived when Khvicha Kvaratskhelia's ball from left to right was volleyed across goal by Piotr Zielinski, and Ismajli bundled the ball into his own net from close range.

It was 2-0 in the 28th minute and again Kvaratskhelia was involved, with his skidding shot parried by Guglielmo Vicario to the lurking Osimhen, who had a simple task of tucking past the floored goalkeeper.

Napoli moved in for the kill, and Kim Min Jae hit the underside of the bar from close range with an attempted header that turned into an effort off his shoulder.

Empoli won the corresponding game 3-2 last season after being 2-0 down, sealing a league double, so Napoli knew they had to be wary of a fightback from the mid-table hosts.

Osimhen thought he had scored again just before the hour when he ran in behind the Empoli defence and tucked home while stumbling under pressure, but he was narrowly offside when the pass was played.

The task was complicated for Napoli when their former Empoli left-back Rui was red-carded for his cheap shot at Caputo, catching the striker in a tender spot.

In truth, Empoli never looked like taking advantage of their extra man and repeating last season's comeback heroics.