It's not clear yet if an operation is required. But if it is required,
it seems that a decsision has been taken for the op to be performed
asap, so that as few games as possible are missed. But he'd obviously
miss the start of the season, and his chances of making the crucial
England game against Poland in 7 weeks would be remote.

Although we do have others reserves, the fact that Matthew Upson
suffered a hamstring injury during the Notts County friendly makes
this a bigger worry.