Sakho limped out of the Hammers’ 1-1 Premier League draw with West Brom at the weekend and reports suggested he could be set for a long spell on the sidelines.
The club’s head of medical and sport science Stijn Vandenbroucke said on the Hammers’ official website: “Diafra unfortunately suffered a significant injury to his left thigh.
“He underwent a scan on Wednesday and will see a specialist on Thursday, when we hope to learn more and put a more certain timeframe on his absence.”
He also revealed another West Ham forward, Enner Valencia, is making good progress after spraining his ankle against Everton last month, and star man Dimitri Payet was ruled out for three months after picking up an ankle injury.
Vandenbroucke added: “[Valencia] has come through a period of immobilisation, during which we gave him permission to return home to South America to spend some time with his family.
“We are pleased to report that Enner is progressing very well and, should his rehab continue to go as planned, he has a good chance to play before the end of the year.
“He is ahead of schedule and we have been very happy with his progress.
“Payet is still in a period of immobilisation after suffering a high ankle sprain in a strong tackle in the same match against Everton. This means that he is still wearing a walking boot, which protects the ankle and keeps the joint in a certain position, allowing the body to heal without straining the injured ligaments.
“Dimi is still able to work on his general fitness and do strength and conditioning work on his upper body. Should everything continue to go to plan, Dimi will progress to the second, more active stage in his rehab this week.”
The head of medical and sports science also said goalkeeper Darren Randolph is available for selection for Saturday’s trip to West Ham, after picking up a knee problem while on international duty with Ireland.
