Alberto Moreno could be out until the new year after it emerged he had suffered damage to his ankle tendons.
The Liverpool left-back will definitely miss Sunday's Merseyside derby due to the effects of the injury he sustained in the first half of his side's 7-0 victory over Spartak Moscow.
Moreno, who has enjoyed a resurgence in form this season having looked destined to leave in the summer, was sent for a scan on Thursday and Liverpool are letting the injury settle further before making a definitive decision on how long he will be absent.
Jurgen Klopp said: 'Not sure.