German club Wolfsburg is also reported to be considering a bid for the Italian international.
The 25-year-old is almost certain to leave the Italian club in the January transfer window, with his agent Silvio Pagliari recently saying that the decision to move on has been made and the destination should be known by the end of next week.
Napoli have reportedly attached a £20m price tag to the forward, who has scored four goals in 18 appearances so far this season.