The Red Devils received the news that midfielder Manuel Ugarte had to be substituted off due to an injury while playing for Uruguay on Tuesday night.
Manchester United have been rocked with yet another injury problem this week.AdvertisementAdvertisementUnited have issues surrounding Noussair Mazraoui, Alejandro Garnacho, Kobbie Mainoo and Amad Diallo.
Manager Erik ten Hag will have to shuffle his pack if he is to put out a competitive team against Brentford on Saturday.
Ugarte, a £50.5M summer signing, was seen clutching his leg in discomfort as he came off in a 0-0 draw with Ecuador.
There is no suggestion that he has a long-term problem, but even a minor injury would likely rule him out for the weekend.