Napoli won their debut friendly of the season 6-0 against a local side with Cristiano Lucarelli's double.
Still without their South American stars, the Azzurri broke the deadlock after 20 minutes when new buy Mario Alberto Santana set up Giuseppe Mascara.
Marek Hamsik whipped in a corner for Christian Maggio's right-foot finish, then there were many changes at half-time.
Veteran hitman Lucarelli came off the bench and within three minutes had nodded in Daniele Mannini's cross.
Mannini was again impressive 120 seconds later by setting up Mariano Bogliacino for 4-0.
Luca Cigarini was brought down for Lucarelli's penalty and then Lucarelli returned the favour, pulling back for Cigarini to get the sixth goal.
Napoli 6-0 Trentino
Scorers: Mascara 20, Maggio 28, Lucarelli 48, pen 65, Bogliacino 50, Cigarini 75
Napoli First Half: De Sanctis, Fernandez, Cannavaro, Ruiz, Maggio, Donadel, Inler, Dossena, Hamsik, Santana, Mascara
Napoli Second Half: Rosati, Grava, Rinaudo, Britos, Mannini, Dzemaili, Cigarini, Aronica, Dezi, Bogliacino, Lucarelli