Manchester United goalkeeper Ben Foster is facing a lengthy spell on the sidelines after his knee injury proved more serious than was at first thought.
Foster underwent keyhole surgery a couple of weeks ago, after his knee had troubled him for during the latter stages of his season-long loan at Watford.
The 24-year-old England international was forced to pull out of the B international against Albania due to the problem and now requires a second operation.
A United spokesperson confirmed: "Ben has a cruciate ligament injury in his right knee and will require an operation in two to three weeks' time.
"While the club's medical staff have not put a timescale on a return to action, he is likely to spend a lengthy spell on the sidelines."
Foster was expected to challenge Edwin Van der Sar for a starting spot at Old Trafford next term, but will definitely miss the start of the new season, as United defend the Premier League crown.