West Ham United manager Slaven Bilic has revealed that Diafra Sakho is likely to be on the treatment table for two months.
The Premier League club are still awaiting the results of a scan, but the 25-year-old's thigh injury is thought to be bad enough to keep him out of action for four to eight weeks.
Sakho suffered the injury during the Hammers' 1-1 draw with West Bromwich Albion at Upton Park at the weekend.
"We are still waiting for the results of his scan, but it will definitely not be a couple of weeks - four to eight, maybe longer," Bilic told reporters. "We are waiting for the opinion of a couple of specialists. He has a bit of history with that thigh. It's not a light one unfortunately.
"Of course it's a big blow. We are not bad in terms of quantity of injuries, but unfortunately they have happened to key players."
Sakho will miss West Ham's hectic festive schedule.