West Brom's England goalkeeper Ben Foster will be sidelined for up to 12 weeks after a scan showed he has suffered a stress fracture of a bone in his right foot.
Foster, who limped off in the 77th minute of the 0-0 draw at Everton on Saturday, will undergo surgery in the next few days.
West Brom boss Steve Clarke told the club's website: "There's no hiding the fact this is disappointing news as Ben is a key player for us. He was excellent on Saturday before his injury forced him off."
Wales international Boaz Myhill, who returned to training this week after a wrist injury, is likely to step in for Foster.
The Baggies can also call on Luke Daniels, who made his first-team debut when he replaced Foster at Everton.
Clarke added: "I've got two other very good goalkeepers to choose from.
"Boaz did well when he deputised for Ben last season and Luke showed on Saturday he is a more than capable goalkeeper."
Foster, 30, who had retired from international football in 2011, returned to play for England against the Republic of Ireland in May.