Napoli coach Walter Mazzarri is confident Marek Hamsik will stay.
Hamsik has been linked with AC Milan.
"I think that I have an important relationship with my players and I believe that Marek wants to stay here," said Mazzarri.
"He wants to play in the Champions League with our jersey on his back.
"The most important and most representative players will stay here in Naples for at least another campaign."