Mazzarri is off contract in June.
"There are no problems with President Aurelio De Laurentiis and we spoke again today. My decision is a personal one and I have to evaluate many things before deciding whether to continue with Napoli or not.
"In order to win the title you need a squad that can achieve that. If you have a squad full of super champions, then of course it's easier to win the Scudetto.