Manchester United could only have two centre-backs available for Liverpool after Jonny Evans' injury.
The veteran defender replaced Raphael Varane in the second half of their clash with Chelsea on Thursday night before coming off in the 66th minute.
evans He had to retire injured, Willy Kambwala taking his place.
Barring injury problems, he and Harry Maguire could be the only centre-backs available for United to face Liverpool on Sunday.
Lisandro Martínez and Víctor Lindelof have both been discarded of action for a month, with Erik ten Hag's resources limited.