West Ham defender Ryan Fredericks is facing a potentially long lay-off with a shoulder injury.
The full-back suffered ligament damage after colliding with Manchester City midfielder Rodri during Wednesday night’s 2-0 defeat.
West Ham say Fredericks, 27, will see a specialist before they know the full extent of the injury.
Veteran Pablo Zabaleta is likely to be called upon again to deputise at Liverpool on Monday night.
Speaking about the injury, Hammers boss David Moyes said: “I can’t confirm exactly how long he’s going to be out for but we know he’s damaged the ligaments in his shoulder and we’re waiting on other advice to see what they think.
“We’re doing everything we can to get him back as quickly as we can. I can’t confirm at the moment if it’s surgery or just a bit of healing time.
“We just need to see what the doctors and medical people tell us. I’m still waiting on getting everything confirmed by the medical people.”