Napoli ace Higuain nets 21st Serie A goal in as many matches

Milan - Gonzalo Higuain struck his 21st goal in as many games to help Napoli tighten its grip on Serie A with a 4-2 win at Sampdoria as title challenger Inter Milan was stunned by a late Carpi leveller.

As Napoli battled to its 14th win of the campaign, Inter paid the price for a series of first-half misses when Kevin Lasagna levelled at the death for the league minnows to secure a 1-1 draw at a stunned San Siro.

Napoli now sit five points ahead of Juventus, who host Roma in Sunday's late game, and have a six-point lead on Fiorentina after their 2-0 win over Torino earlier in the day.

Inter have dropped to fourth at six points adrift, enforcing the pundits' belief that it is now a two-horse race for the title.

After what has been a trying week for Napoli, the Azzurri showed their mettle.

Coach Maurizio Sarri was caught in the eye of a homophobic storm after calling fellow coach Roberto Mancini a "poof" during a post-match tirade following defeat to Inter Milan in the quarter-final of the Italian Cup.

Inter drew a line under the controversy on Friday by publicly accepting Napoli and Sarri's apology.

A trip to Sampdoria looked a challenging prospect for Sarri's title challengers, but after ballooning an early chance over Higuain was soon into his usual, predatory stride.

In the ninth minute the Argentinian pounced on a poor Edgar Barreto back-pass to power towards the area and fire past onrushing Emiliano Viviano.

Another Barreto blunder helped Napoli double its lead by the 18th minute, the defender hauling down Raul Albiol and the referee pointing to the spot.

Despite Higuain's chance to match the 22-goal tally that won the league's Capocannoniere (top scorer) award for Luca Toni and Mauro Icardi last season, Lorenzo Insigne stepped up to beat Viviano at his near post.

Napoli was in command, but was pegged back after Carlos Carbonero did well to win back possession and powered down the right flank.

Sampdoria striker Eder's dummy was crucial, allowing Joaquin Correa to run in and beat Pepe Reina first-time from 12 yards.

A superb piece of individual skill from Napoli captain Marek Hamsik helped Sarri's men restore their lead, the Slovakian shimmying past three players inside the area to toe-poke the ball past Viviano at his far post on the hour.

Sampdoria pulled one back on 73 minutes when Eder rose to meet a corner to fire a glancing header through the legs of Reina, but six minutes later the match was effectively over.

Dries Mertens had replaced Insigne with 15 minutes remaining and only four minutes later the Belgian international took on two Samp defenders before beating Viviano with a low shot at his far post.