Napoli coach Luciano Spalletti is confident of Kim Min-jae's commitment.
The South Korea defender is being linked with Manchester United and Tottenham.
“There are cities with more relevance at a footballing level but not the same passion as Napoli fans," he said.
“When a player experiences this passion, it's hard to consider other clubs, even in the Premier League. It's hard to imagine Kim leaving Napoli because he is happy in this city and in this club.
"This is the right place for him."