Victor Osimhen scored twice as Napoli crushed Sampdoria, 4-0, on Thursday to remain perfect in Serie A and return to the top of the table.
Visiting Napoli rode their luck in the first 35 minutes in Genoa.
After 11 minutes home goalkeeper Emil Audero was fooled when Osimhen mishit a close range volley and had already fallen back across the goal line by the time the softly-struck ball floated into his grasp.
Sampdoria responded by besieging the Napoli goal, but David Ospina foiled a series of incisive attacks with a string of acrobatic saves.