Napoli defender Kalidou Koulibaly scored a last-gasp goal to keep his side’s title hopes alive as they earned a vital a 1-0 win at Juventus to close the gap to just one point at the top of Serie A.

Senegal star Koulibaly headed the winner from a Jose Callejon corner in the final minute to give Napoli a first ever win at the Allianz Stadium.

Six-time defending champions Juventus’ lead at the top of the table has been cut to just one point with four games left.

The closest Juve came to a goal was in the first half when Miralem Pjanic hit the woodwork with a deflected free-kick.

It was a third defeat of the season for Juve and their first since November.

Napoli are looking for a third ever league title and their first since 1989-90 when Diego Maradona was in their side.