Allegri got to work with the five time Ballon d'Or winner for one year in Turin, with the striker helping to win the Old Lady's eighth Serie A title in-a-row, which was the fifth under Allegri.
The Italian left that summer and, whilst Juve went on to win the next league title as well, the former AC Milan boss told the club to do away with Ronaldo too.
According to Italian outlet La Repubblica, the manager's final meeting with chairman Andrea Agnelli involved the manager saying, "Get rid of Ronaldo, he's blocking the growth of the team and the club."
The suggestion is that the presence of the former Manchester United forward was stopping younger players coming through and getting gametime, but the chairman clearly didn't see it that way.
Having won seven Italian titles on the bounce before they spent a reported €100 million, it was clearly that the Turin side bought Ronaldo to capture the Champions League.
They have won two league titles since signing Ronaldo but the five time winner of Europe's top club competition is yet to deliver them the title that the club has been without since 1996.
In his first year at the club, Juve managed to make it to the quarter finals but subsequently they've fallen at the last 16, including this season's loss to Porto when Ronaldo was criticised for turning his back on the match winning free-kick.
THIS IS TRULY INCREDIBLE!!!!- Football on BT Sport (@btsportfootball) March 9, 2021
Sérgio Oliveira scores for 10-man Porto and the visitors are on the brink of going through!
WHAT. A. GAME! pic.twitter.com/PkUAlrfxd5
Whilst Angelli wasn't ready to sell his most expensive ever signing after just one year at the club, Ronaldo was reportedly close to leaving last summer.
The 36-year-old's agent Jorge Mendes reportedly tried to get either Manchester United or PSG to sign him but both teams refused to make a move.
However, the club could get his reported £28 million-a-year contract off their books this summer, with Zinedine Zidane recently claiming Real could re-sign him. "Yes, it could be... we know Cristiano but he's a Juve player now, and we have to honour this, he's playing for another club," the Real boss said.
"Now let us see what the future will be."
Featured Image Credit: PA
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