"He's got a lot of talent and intelligence, he knows that he needs to work harder than everyone else," said Milan captain Davide Calabria after the match.
Tonali and Zaniolo were questioned by police at Italy’s training camp ahead of upcoming European Championship qualifying matches. They subsequently left the national team’s headquarters.
Pogba had been a star player in France's 2018 World Cup triumph but his 2022-2023 season was blighted by injury and a multi-million euro blackmail plot involving childhood friends and his brother.
Fiorentina, who finished in eighth place in Serie A last season, are likely to replace Juventus in the Conference League.
Napoli's title triumph was the crowning glory of Spalletti's long and eventful coaching career which has brought plenty of plaudits but few trophies.