The Red Devils are looking to continue their recent improved form at Champions League-chasing rivals Villa on Sunday.
While United’s injury crisis has eased in recent weeks, Lisandro Martinez’s injury against West Ham on Sunday was a major blow to the side’s top four hopes.
Casemiro has returned from a hamstring injury in the last three weeks, but he was not spotted in training on Wednesday.
Ten Hag has demonstrated his faith in youth this season, with Kobbie Mainoo breaking through to the first team with youth cup colleague Alejandro Garnacho.
And a trio of youngsters could be ready for their own taste of the action after Harry Amass, Toby Collyer and Sam Mather trained with the first team on Wednesday.
Amass, a left-back who joined from Watford last summer, is still just 16 and widely considered one of the most exciting English talents in his age bracket.
The defender has been a major part of the U18s this season, who have experienced an unbeaten start to the season.
Mather, 19, and Collyer, 20, are yet to sample first team football for the Red Devils.
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