Juventus won their eighth consecutive Serie A title with a home victory over Fiorentina on Saturday.
Massimiliano Allegri's side fell behind early to Nikola Milenkovic's opener. Alex Sandro equalised with a header before Pezella scored an own goal from Ronaldo's cross.
After the game in the mixed zone, Pavel Nedved, legendary striker turned vice-chairman, described the title win as "crazy".
Sporting Director said it was a testament to the club that it became the first side to win eight consecutive league titles in Italian football. "Think how hard it is to win eight years in a row," he said.
For his part, Allegri was pleased to wrap up the season with five games to spare. "I don't feel like a man of records. I'm a lucky man who trains great players," he added.
Cristiano Ronaldo also made some history of his own, becoming the first player to win the Premier League, La Liga and Serie A.
The Old Lady have now won 35 Scudettos, far ahead of closest rival AC Milan on 18.