Soccer: Benitez hails 'best debut of my life"
Napoli aiming to thwart Juve's third straight scudetto bid26 August, 14:38
"I'm very satisfied, this is the best debut of my career," said the former Valencia, Liverpool, Inter and Chelsea coach.
Benitez warned rivals that "we're still lacking a lot from the physical standpoint, we can still grow a lot".
Napoli are among the favourites to stop Juventus - 1-0 winners at Sampdoria - claiming their third straight title.
Of the others, Inter beat Genoa 2-0 but Milan lost 2-1 at Verona.