Napoli maintained their impressive form with a 2-0 win at Verona to send them top of Serie A.
Maurizio Sarri's men were made to work hard, though, as they had to rely on quickfire second-half goals from Lorenzo Insigne and Gonzalo Higuain.
An unmarked Insigne broke the deadlock in the 67th minute, with Higuain's close-range second following soon after.
Once Napoli got in front there was little hope for Verona and the visitors saw out a fifth successive league match without conceding a goal and a 12th game unbeaten overall.
They were later joined at the summit by Fiorentina, who drew with Empoli, but Inter Milan could overtake them both with a victory over Frosinone later on Sunday.