Under Sarri, Napoli amassed a whopping 91 points, but finished four points off of Juventus and the title. And Ventura thinks that this season, the Old Lady is likely to maintain her grip on the league, particularly given the acquisition of Ronaldo - at least until Ancelotti finds his feet in Naples.
"Napoli? The field will tell us how long Ancelotti will need. Carlo arrived after three years of important football done by Sarri with a fierce organization. Now he must be given time to build on that and then put his ideas in place," he told Marte Sport Live .
"The two comebacks (wins over Lazio and Milan) were excellent results, but the games were won with so many difficulties. He might not make 91 points this season, but he could still win a competition.
"The 'anti-Juve'? It's too early to say who it will be. Napoli conceded three goals against Sampdoria, Roma and Inter have already lost. Juventus have just won seven league titles and bought Cristiano Ronaldo, so they are the 'super-favorite'. Napoli must return to challenge Juventus, but need some time.
"Ancelotti and Cristiano Ronaldo give prominence to the Italian championship and that is a very important factor for the whole movement."
Ventura was also keen to stress the quality at Ancelotti's disposal, with just Jorginho missing from the team that excelled under Sarri last term, saying: "[Piotr] Zielinski? He can still improve. [Marko] Rog is a player who has yet to fulfill his potential in Italy, but he is interesting. [Lorenzo] Insigne? I believe that Sunday in Genoa was not his best game, but it is an isolated episode. He usually misses just one game a year, he is an important player for Napoli and Italy."
Ventura also commented on the national team's return to competitive action under former Manchester City head coach Roberto Mancini in the UEFA Nations League, with the Azzurri facing Poland on Friday after Ventura failed to guide his country to the World Cup in Russia this summer following a 1-0 aggregate playoff defeat to Sweden.
"I wish the national team well with great affection. I hope it's the beginning of a rebirth for an Italy that needs it. I'll watch Italy versus Poland tonight," he said.