Napoli have been held to a goalless draw by AC Milan at San Siro to leave their Serie A title hopes hanging by a thread.
The Partenopei failed to find a way through as they dropped points for the third time in five matches, handing the initiative to Juventus.
Juve can now move six points clear at the top if they beat Sampdoria at the Allianz Stadium on Sunday evening.
Napoli grew into the contest after a slow start that saw their opponents have a goal ruled out for offside through Mateo Musacchio, and Pepe Reina – who will switch clubs in the summer – did well to push behind Giacomo Bonaventura’s strike.
Dries Mertens tested Gianluigi Donnarumma at the other end and Lorenzo Insigne curled the ball inches wide following a positive run into the box.
Neither side could truly get going for large parts of the second half, but it was the visitors looking the more likely to make a breakthrough.
Donnarumma was well positioned to keep out Insigne’s angled shot, before producing a remarkable save in stoppage time to deny Arkadiusz Milik from six yards.