Napoli produced a sensational performance to beat Juventus and go 10 points clear in their bid for a first Serie A title since 1990.
Juventus had won eight games in a row without conceding but that record was ruthlessly ended at the Diego Armando Maradona Stadium.
Victor Osimhan scored twice with Khoecha Kvartsakhelia, Amir Rahmani and Alf Elmas also on target.
Angel Di Maria replied for Juventus, who moved up to third as a result.
Osimhen opened the scoring for Napoli and then provided a pass for Kvaratskhelia to double their lead, but Di Maria hit back before the break.
Rahmani restored the home side’s two-goal lead 10 minutes after half-time before Luciano Spalletti converted.
Georgian star Quartskelia picked out Osimhan with a superb cross and the Nigerian striker grabbed his 12th Serie A goal of the season.
Almas’ deflected effort completed the scoring, as Juventus conceded five goals in a game for the first time since May 1993.
Massimiliano Allegri’s side had already lost just seven in the top flight this season and were third on points with second-placed AC Milan.
But it was a breath-taking Napoli display, underscoring the hosts’ credentials for a first Serie A title since Maradona joined the ranks 33 years ago.
