The defender is again being linked with Manchester United this week.
But he says: "The goal is to win the Scudetto by beating the best, although this year it will be more difficult because everyone has reinforced and the competitiveness of the championship has increased.
"Juve remains the team to beat.
"The market? I'm used to it, there are so many of them where they talk about my departure, but my goal is to win with Napoli, for anything else I don't care."