Napoli surprised Real Mallorca with a 1-0 friendly victory in Spain, as Juan Zuniga got the winning goal.
The Partenopei are preparing for Champions League football as well as Serie A this season and engaging in a series of high-profile friendlies.
Hugo Campagnaro almost opened the scoring within 120 seconds, but his header cracked against the crossbar.
Zuniga rose to nod in Mario Alberto Santana's cross after 15 minutes in what proved to be the winning goal against Real Mallorca.
Antonio Rosati needed saves to deny Tejera, Castro's header and a De Guzman free kick, ensuring the Napoli victory.
It was an impressive win considering Edinson Cavani and Ezequiel Lavezzi are still on vacation after the Copa America.
This also rained on Mallorca's parade, as this match was part of the team's official presentation to fans for the new season at the Iberostar Stadium.
Real Mallorca 0-1 Napoli
Scorers: Zuniga 15 (N)
Real Mallorca: Aouate, Zuiverloon, Nunes (Crespi 46), Ramis, Caceres, Alejandro, Marti (Pina 65), De Guzman, Tejera (Castro 57), Nsue, Tomer
Napoli: Rosati; Campagnaro (Fernandez 69), Aronica, Ruiz; Zuniga (Dezi 82), Donadel, Dzemaili (Inler 53), Dossena; Mascara (Hamsik 56), Santana (Maggio 72); Lucarelli