Inter currently trail Serie A leaders Napoli.
But Cannavaro told Sportmedia: "A championship that is certainly interesting, especially because this year there is no one who has created a vacuum.
"In my opinion, Inter remains the best-equipped team and you can see that with the results of the Champions League. Then there is Napoli, who has shown great solidity from the beginning and a clear idea to return to winning.
"It is an important message that they have given to the championship."
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Internazionale
Napoli
Fabio Cannavaro