Milan lead the table while Juve are strong favorites to retain their crown, but the Napoli boss feels neither will lift the title this term.
AC Milan, yet to be on the wrong end of a league scoreline so far, have gained a healthy edge over other contenders early in the Serie A title race.
The Rossoneri maintain a five-point cushion sit against the second-placed side having collected 23 points from nine games so far.
Stefano Pioli’s side have looked the real deal in the 2020/21 campaign and many are backing them to go all the way and win their first Scudetto in almost a decade.
Elsewhere, Juventus are also picking up speed as they aim to get their hands on the title for a 10th consecutive time.
The defending champions sit seven points behind Milan at fourth as they struggle for consistency under new boss Andrea Pirlo.
Napoli, who are level on points with Juve but rank fifth, have also enjoyed a fine start to the season, but Gennaro Gattuso believes Inter Milan are favorites to win Serie A this season.
“They combine quality with physical strength, they have so many options available and they are the favorites.
“Then there’s Juventus, who are accustomed to being up there.”