England goalkeeping legend Peter Shilton believes Ben Foster may have to leave Manchester United if he wants to save his international career and reach his peak level.
Peter Shilton on England's World Cup goalkeepers
Shilton, who made a record 125 appearances for England, has tipped West Ham United goalkeeper Robert Green to be Fabio Capello's No.1 at the World Cup this summer because Foster has struggled for form and fitness at Old Trafford.
"My choice as England goalkeeper would be Green and that's disappointing for Foster," said Shilton. "Foster was on a par with Green a while back but he is not playing first-team football anymore and that is going to count against him."
"I feel he may miss out this summer and although he does not want to leave a team like Manchester United, he may have to. It depends how long he wants to hang around not playing. It's going to be a big decision."
Foster was handed his chance to impress at United at the beginning of the season with Edwin van der Sar sidelined with a broken a hand, but his performances are remembered for blunders and inconsistency.
The 27-year-old has played just nine Premier League games this season and has fallen behind Tomasz Kuszczak as Van der Sar's understudy.