West Ham United forward Diafra Sakho is reportedly due to undergo a scan on his thigh on Wednesday in order to learn the extent of his injury.
The 25-year-old limped off the pitch during Sunday's 1-1 draw with West Bromwich Albion at Upton Park.
After the game, manager Slaven Bilic admitted that he was 'worried' about the injury, but according to PA, the club are not yet sure of its severity.
Some reports have claimed that Sakho could be out of action for three months.