Chris Kirkland has been ruled out of West Bromwich Albion's next two Premiership matches after suffering bruised kidneys during the match away to Bolton Wanderers last Sunday.
The England under-21 international goalkeeper, who is a quarter of the way through a season-long loan spell from Liverpool, will miss the matches against Newcastle United on Sunday and West Ham United in eight days' time.
Russell Hoult, who has been spending time on loan with Nottingham Forest, will be recalled to the Albion squad.
Bryan Robson, the Albion manager, says that Kirkland's injury is not serious. Indeed, he does not require medical treatment and has merely been told to rest for a week or so.
"Chris suffered a really bad knock against Bolton on Sunday," Robson said. "We thought he'd got away with it, but the severity of the knock has caused him to suffer bruising on one of his kidneys.
"It's nothing serious but he's been advised by doctors to rest for between two and four weeks. Both Chris and the club have got to take that medical advice on board.
"He will miss the Newcastle and West Ham games but we're hoping he will be back after the international break."
The injury is not likely to jeopardise former Coventry City goalkeeper Kirkland's place in the senior England squad when they play Argentina in Geneva next month.
It is a second setback for Albion who will also be without left-back Paul Robinson for three games as a result of his sending-off against Fulham in the Carling Cup on Tuesday night.
Kirkland and Robinson have been two of Albion's best players this season and Robson is frustrated to lose such significant individuals at such a crucial stage.
Junichi Inamoto, meanwhile, has pledged to fight for a regular place in the Albion team to cement his World Cup place with Japan this summer.
Robson says that Inamoto, previously out of favour at The Hawthorns, has every chance of achieving both ambitions if he continues to perform as he did in his match-winning show against Fulham at Craven Cottage on Tuesday.
Inamoto, who signed for Arsenal in a blaze of publicity four years ago but never played a Premiership game for ArsEne Wenger's team, struck a stunning extra-time winner to seal Albion's 3-2 third-round triumph.
"I am aiming now to play as many games as possible for West Brom in World Cup year," Inamoto said. "I know it will mean a lot of hard work because we have some fine players in the squad, but I was delighted to make one goal for Rob Earnshaw and score another for the team against Fulham and hope I have done enough to be noticed."
Inamoto, aged 26, left Arsenal at the end of the 2001-2 season to join Fulham where he made 41 appearances over two seasons and scored a hat-trick in an Inter-Toto Cup final.
He moved on again when the Thames-side club would not pay an extra £600,000 to Gamba Osaka, his Japanese club, to keep him.
He made only three appearances for Albion last season but, following an ankle injury, was loaned out to Cardiff and after returning to The Hawthorns this summer, he was selected for the opening game of the season against Manchester City.
But until Tuesday night, he had made only one further appearance, as a substitute against Chelsea and wanted to go on loan again and stay sharp for the world's biggest tournament in Germany next year.
But now Robson, who described Inamoto's performance as "outstanding" at Craven Cottage, is hopeful the midfielder has finally adapted to the demands of the English game.
Andy Johnson, meanwhile, has been linked with a permanent move to Sheffield United. The Albion midfield player, who has not played in recent matches, was on the brink of a loan move to Coventry City until the proposed deal fell through.
Now United, who are at the top of the Coca-Cola Championship, are interested in signing the former Wales international.
Albion have agreed to extend Lloyd Dyer's loan spell at Queens Park Rangers by a further month. The wide player was due to return after the London side's match at Derby on Saturday.