Josh Wright has sustained a grade two hamstring tear and will be missing for a month Phil Brown has revealed.
Anton Ferdinand will also be unavailable for Saturday’s game against Northampton Town, but his injury is thought to be not as serious.
Michael Timlin and John White are both “50/50 for the weekend”.
Brown gave updates on squad fitness at his Thursday press conference, starting with the latest on midfielder Wright.
“It’s not great news on Josh Wright, bearing in mind I was ten seconds away from taking the lad off the pitch and replacing him with Jermaine McGlashan, which eventually happened obviously,” he said.
“Josh has torn his hamstring with a grade two tear and he will probably be on the sidelines for about a month. With a bit of luck that’s all it will be.
“He’s a conscientious lad, he’s a hard worker, he wants to do everything he possibly can to get himself back as quickly as he can. I know that sounds like a contradiction to a certain extent as all pro footballers should be like that.
“He’s got a good mentality and a good attitude and we hope he will be back sooner rather than later.”
On Ferdinand, Brown said: “The scan on Anton has revealed wear and tear more than anything else. It’s a mechanical problem as opposed to a pulled muscle and hopefully with rest and recuperation Anton will be back in 10 days.”
Rob Kiernan could be back on the training ground in the not too distant future according to the Blues boss.
“Rob’s progressing nicely and will hopefully be back on the training ground some time in January, maybe in a couple of week’s time.
“That will be on the grass, kicking a ball for the first time for a long time.”