Manchester United are "onto a good thing" with Eric Bailly if he can steer clear of injuries, according to Rio Ferdinand.
Bailly has endured mixed fortunes at Old Trafford since completing a £30 million ($41m) move from Villarreal in June 2016.
The Ivory Coast international helped the Red Devils win a Europa League and League Cup double in his first season but has since been unable to hold down a regular spot in the team due to fitness issues.
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He only made four Premier League appearances for Ole Gunnar Solskjaer's side in 2019-20 and fell behind Harry Maguire and Victor Lindelof in the squad pecking order.