Signed in 2005, Ben Foster really did possess the potential to be Manchester United's no.1 after Edwin Van der Sar called it a day.
Unfortunately, the English stopper could never put together a consistent run of form between the Old Trafford sticks. He was loaned to Watford between 2005/07, and upon his return, was forced to undergo cruciate knee ligament surgery.
Foster had to do battle with Tomas Kuszczak for a place on the United bench. With Van der Sar injured, Sir Alex Ferguson continuously flitted between the two reserve stoppers, giving both time to impress.
Although Foster appeared in Premier League and Champions League fixtures, his best performance came in the 2009 League Cup final against Tottenham. He saved Jamie O'Hara's penalty in the deciding shootout, capturing silverware for United.
Unfortunately for the keeper, this was as good as it got. Major mistakes during the 2009/10 season saw him heavily criticised. Ferguson's patience eventually ran out, and in 2010, Foster made his way to Birmingham City.
Since leaving, Foster has established himself as one of England's best keepers. He produced an excellent 2012/13 season with West Brom and continues to hover around the international setup.