Il Corriere della Sera (via ilbianconero) confirms that Bonucci's bad relationship with Allegri and with part of his teammates are the main reasons why he swapped Turin with Milan.
"Juventus Football Club announces that it has reached an agreement with AC Milan for the definitive disposal of the registration rights of the player Leonardo Bonucci for a consideration of € 42 million payable in three years".
The centre-back was shown arriving at Milan's headquarters in a video on the club's Twitter feed.
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Milan will reportedly pay a 40 million euro ($45 million) transfer fee to Juventus and sign Bonucci to a five-year contract worth up to 10 million euros ($11 million) per season, including bonuses.
When Bonucci arrived at Milan's offices Friday to sign the expected deal, his auto was surrounded by Rossoneri fans.
Montella is delighted with the progress being made at Milan as the club seeks a return to the Champions League, although he insisted his side should not yet be considered among the favourites for the Serie A title after finishing sixth last season, 28 points behind Juve.
"I don't feel the pressure". "Our objective has to be getting into the Champions League and that is a very exciting challenge, especially with all the new signings. I am happy for Bonucci, it was a surprising transfer, but he is a great player and I'm sure he'll improve our game".