The highly-rated Uruguayan has been linked with Real Madrid, but Chelsea, Manchester City and Paris Saint-Germain are also thought to be considering bids for the 26-year-old.
Cavani reportedly has a £53million buy-out clause built into his current contract with Napoli.
Speculation over a possible move to the Bernabeu increased recently when media reports claimed that Real Madrid had offered a substantial fee plus striker Gonzalo Higuain in return for Cavani.
However Cavani, currently on duty for his country at the Confederations Cup in Brazil, seemed unsure if Spain would be the right place for him.
"I don't know if Spanish football suits me," he declared.
"Football there is wonderful as everyone knows, you have more freedom, but I don't know what will happen."