Emanuele Calaiò scored twice in Napoli's 5-1 pre-season friendly win over Feralpi Salò.
"It is a positive debut in our first pre-season friendly," Benitez told the official Napoli website.
"We did what we wanted to on the field, those things that we practiced during the week in training.
"In general we did good things and others that we can still improve on. We're happy to have scored five goals and played with intensity after a week of double training sessions."