The Uruguayan striker has been linked with a host of clubs across Europe this summer, most notably Real Madrid, Chelsea and Manchester City.
However, the San Paolo outfit are ready to reject every bid for the 26-year-old as both the Spaniard and club president Aurelio De Laurentiis are determined to hold on to their star.
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"Of course, he was a clause which none of us can control. But the president and I want him to stay and continue to grow at Napoli.
"He has become famous with this club and he can achieve even more in a team and with fans who worship him.
"He knows what the club and the Napoli supporters have given him. He will not have problems competeing with us again and going for success with the club.
"Napoli don't need money. If he leaves, it will be for his clause, which is a very high amount. But our intention is that he stays with the team.
"Neither the president nor I are proposing that we have to sell Cavani, only to strengthen the team so that Cavani can be even more important.
"I am aware that there have been offers, but there is a clause and if they want the player, they will have to pay it."