Napoli sports chief Pierpaolo Marino says there's a lot more to come from coach Edy Reja's young team.

"This side has a great margin for improvement," argued Marino. "The team's average age is young enough to suggest there's a big improvements to come.

"Players like Marek Hamsik, Ezequiel Lavezzi and Walter Gargano are still getting used to football at this level. With the right application, there is a lot more to come from them."