Manchester United goalkeeper Anders Lindegaard is expected to miss around four weeks with an ankle injury.
Lindegaard, who has recently moved ahead of David De Gea in the pecking order at Old Trafford, damaged ankle ligaments in training on Monday and appears unlikely to feature for another month.
With De Gea ruled out through illness, Sir Alex Ferguson handed Ben Amos his Premier League debut in Tuesday's 2-0 victory over Stoke, and the 21-year-old is desperate to prove he is ready for more first-team action.
"I've been waiting a long time for an opportunity," Amos said. "I'd like to think I've made the most of it. I feel I've been ready to play at this level all season.
"All I can do is go out and do the best I can, and put pressure on the other goalkeepers in training and try and get a chance in the games, but it's the manager's decision at the end of the day."
Former Denmark international Morten Bruun believes the injury could not have come at a worse time for Lindegaard.
"Lindegaard has suffered an injury at a time when he is the first-choice goalkeeper, so he must be feeling very bitter about it," he told Sporten. "This is a great opportunity for De Gea to reassert himself as first-choice goalkeeper. It's a chance he wouldn't have had if Lindegaard was fit."
Tomasz Kuszczak has also been reportedly been given extra training sessions, but De Gea is expected to be fit in time to face Chelsea on Sunday.