Before joining AC Milan for €40m in a shock move past year, Bonucci spent seven seasons at Juventus, helping them win six successive Serie A titles.
It is believed that the Rossoneri are close to signing the one-time capped Italian worldwide as part of a sensational swap deal that would see veteran centre-half Leonardo Bonucci return to Juventus only a year later after he had left Turin for Milan.
Leonardo Bonucci has completed his medical at Juventus to seal a return to the club just 12 months after leaving.
Juventus star Paulo Dybala has shared a fond farewell to Gonzalo Higuain as the 31-year-old finalises a move to AC Milan.
The player's denials of an issue with his then-former boss now appear honest after their reunion was sealed, with the highly-rated Caldara - who only officially linked up with the Bianconeri earlier this month after a switch from Atalanta - taking Bonucci's place at San Siro.
The two Italian giants have spent the best part of this week discussing a sensational triple transfer, which sees two Juve players heading off to San Siro.
Argentina striker Higuain scored 16 Serie A goals last season but found himself surplus to requirements after Cristiano Ronaldo's arrival from Real Madrid.
According to Sky Sport Italia the deal is worth a £32million option to buy next year, while they could get Mattia Caldara with Leonardo Bonucci in return.
Across his career in Turin, Bonucci has won six consecutive Serie A titles, as well as two Champions League runners-up medals.
Chelsea has opened talks with Inter Milan in a bid to sign midfielder Matias Vecino over the weekend during their International Champions Cup in The USA.