Liverpool manager Arne Slot says defender Joe Gomez will miss "large parts" of the remainder of the season with a hamstring injury that may require surgery.
The England centre-back was substituted after 11 minutes in Liverpool's FA Cup fourth-round defeat by Plymouth Argyle on 9 February.
Gomez was making his first appearance after six weeks out with a previous hamstring problem.
The club have yet to decide whether 27-year-old Gomez, who has been limited to 10 starts this season, requires an operation.
But Slot says that he "might", and the defender will be out for a lengthy period whether an operation is required or not.