Napoli extended their unbeaten run in Serie A to 10 games with a 2-1 victory over AC Milan at San Siro.
Maurizio Sarri's side stormed out of the blocks and were two goals up within the opening nine minutes.
Lorenzo Insigne finished off a swift Napoli counter-attack on six minutes before Jose Callejon swept home from a tight angle moments later.
The Rossoneri secured a route back into the game seven minutes before half-time when Juraj Kucka scored from 15 yards.
Mario Pasalic then headed against the bar moments after half-time as AC Milan looked to maintain their own slim title hopes.
Third-placed Napoli, though, held on to move within a point of leaders Juventus, who have two games in hand.
Fiorentina maintained their quest for Europe with a resounding 3-0 victory at Chievo.
Paulo Sousa's side beat Juve last time out and they picked up where they left off at Stadio Marc'Antonio Bentegodi to move up to eighth.
Cristian Tello got Viola off and running in the 18th minute before Khouma Babacar doubled the visitors' lead seven minutes after half-time.
Federico Chiesa's first Serie A goal for Fiorentina sealed the three points in added time and condemned Chievo to a fourth straight league loss.