Napoli boss Walter Mazzarri feels they need to shop at the very top shelf if they're to improve his squad.

Mazzarri was speaking after victory over Juventus.

"One can always improve, but to reinforce this squad we need truly strong players who decide to marry the cause. It's difficult to talk about reinforcements when we have a squad like this," said Mazzarri.

"If players arrive with quality who will fight for Napoli and put themselves at the service of the team, then they are welcome. For now I am happy with what I have."