West Ham right-back Vladimir Coufal is set for a spell on the sidelines after the club confirmed he has undergone surgery on a groin injury.
The defender, who has been managing the problem for a while, missed last weekend's 1-1 draw with Newcastle due to an issue with his hernia, with Ryan Fredericks taking his place.
In a statement released on Thursday, West Ham confirmed Coufal will now be unavailable to David Moyes while he undergoes rehabilitation.