Ademola Lookman scored as Atalanta beat Genoa 2-0 in a Serie A encounter at the Gewiss Stadium.
The winger opened the scoring for La Dea in the 68th minute.
Lookman has now scored three goals in nine league appearances for Gian Piero Gasperini’s side this season.
The 26-year-old was replaced by Mario Pasalic 11 minutes from time.
The Nigeria international has scored 13 goals in 31 league outings for Atalanta last season.
Napoli are sixth on the standings with 16 points from nine matches.