Edinson Cavani struck his 100th goal for Napoli in their 1-1 draw with Fiorentina.
Napoli are still joint second with Lazio, but now five points adrift of leaders Juventus.
Napoli coach Walter Mazzarri said: "We hope to do even better, as we may have 13 more points than at this stage last season, but we won't rest on our laurels.
"Cavani? Well, what more is there to say?"