Napoli dealt Serie A rivals Juventus their second defeat of the season to revive a humdrum title race.
The Bianconeri were unbeaten in 22 league games and cruising heading into Sunday night’s game at the Stadio San Paolo but goals from Jose Callejon and Dries Mertens gave Napoli the 2-0 victory.
Rafael Benitez’s men may be a distant 17 points off the championship pace, yet Roma have a game in hand and could cut Juve’s lead to only eight points by beating Parma on Wednesday.
The leaders will have 18-goal striker Carlos Tevez – suspended in Naples, leaving Juve rather toothless in attack – back for the run-in and ought to clinch enough wins from seven games to claim their third straight Scudetto.
Resounding jeers meant the hotly-anticipated match was finally under way and that Juve were on the ball, but Napoli would control the early stages.