Former Italy star Gianfranco Zola believes Inter Milan are favourites for the Scudetto.
Inter are a point behind leaders AC Milan, though also have a game in hand.
Zola said: "I think Inter have something more in terms of depth of the squad and quality.
"Napoli must try to win them all, this Milan plays well and is full of energy.
"Such a final stretch is important, it was needed after the disappointment of not qualifying for the World Cup."