Norwich goalkeeper John Ruddy is facing up to three months on the sidelines after sustaining a thigh injury in Saturday's draw with Everton.
The 26-year-old was forced off just minutes before the full-time whistle in a 1-1 draw at Goodison Park, and the Canaries revealed the extent of the injury on Twitter, prior to Wednesday's match against Southampton.
"City can confirm 'keeper @Johnruddy86 has a thigh injury which is being assessed, but he could be out for approximately 3 months," the club tweeted.
Ruddy has been in impressive form since City's promotion to the top flight and is now a regular in Roy Hodgson's England squad after making his Three Lions debut against Italy in August.
Mark Bunn was named as his replacement in the match against Nigel Adkins' side at St Mary's.
Ruddy tweeted: "Just to update everyone on my injury, unfortunately I have torn my thigh will be having surgery on Saturday and out for up to three months."