West Ham midfielder Tomas Soucek is expected to be sidelined for three weeks, the club have announced.
The 24-year-old suffered a low grade hip injury during his side's 3-2 defeat to Liverpool at Anfield on Tuesday.
Soucek joined the Hammers on loan in January and had impressed on his three outings for David Moyes' side.
Richard Collinge, head of medical services at West Ham, said: "Tomas over-extended his hip flexor muscle but the scan was positive and revealed only a low grade issue.
"We hope to have him back before the international break in March."