Wolves utility man Kevin Foley is facing a further spell of one month on the sidelines after undergoing an ankle operation.
The injury has restricted the 26-year-old Republic of Ireland international to just one start this term in their Carling Cup win over Northampton.
Foley has been trying various treatments in a bid to return to full fitness, however, Wolves' hopes of avoiding surgery have now been dashed.
Manager Mick McCarthy has confirmed that Foley will be having a clear-up operation and he remains hopeful the defender/midfielder will not miss more than a month.
"Kevin Foley is having an operation (on Tuesday)," McCarthy told the club's official website.
"It depends on what type of operation he has as to how long he's out for.
"We always try conservative treatment but they're just going to open him up to see.
"I think it's only going to be a little clear-up operation so hopefully it will only be four weeks."
Meanwhile, Steven Fletcher's calf muscle is expected to sideline the striker for between two to four weeks.
However, McCarthy is hopeful Dave Edwards and George Elokobi will be able to return to training this week.
"Hopefully Dave Edwards will train on Thursday and George might train at the end of the week," he continued.