Paul Pogba, Eric Bailly, Chris Smalling and Phil Jones all trained with their Manchester United team-mates ahead of Thursday's Europa League clash against Celta Vigo.
Bailly and Luke Shaw were the latest to join United's lengthy injury list when they were both forced off during Sunday's 1-1 draw with Swansea.
Shaw's foot injury could well end his season but key defender Bailly, who limped off in the 61st minute, does not appear to have suffered any lasting damage.
Neither Smalling nor Jones have featured for United since picking up knee and toe injuries respectively on England duty in mid-March.