Chelsea signed free agent Malang Sarr on a five-year contract.
Before leaving the former club when his contract expired in June, the center-back who can also play on the left side of the defense made 19 appearances last season in Ligue 1 for OGC Nice.
The 21-year-old will join in a free transfer, the Blues announced but will spend out on loan the 2020/2021 season to obtain further first-team experience.
On signing, Marina Granovskaia, director of Chelsea told the club’s website: “The opportunity to sign Malang was one we could not miss.”
“He is a tremendous prospect and we will be monitoring him closely during his loan period, hoping he will soon be back at Chelsea. We are very happy to welcome him to the club today.”