The 26-year-old had been at the Ligue 1 side for less than six months and he was officially presented by the Isolani on Friday.
“To sweat everyday for this jersey is my commitment and my promise,” Rugani said on Twitter.
Rugani’s time in France had been marred by a hamstring injury and after playing just two competitive matches with the French club in the first half of the 2020/21 campaign, they sent him back to the Bianconeri.
Juventus have sent him on loan to Cagliari for the remainder of the 2020/21 campaign but he is not expected to be purchased on a permanent basis by the Isolani.
— Daniele Rugani (@DanieleRugani) February 5, 2021