Wolverhampton Wanderers goalkeeper Wayne Hennessey is ready to face Blues if required on Saturday.
The Welsh international was dramatically thrown into the fray against Sheffield United this week.
The Welshman was called upon when first choice shotstopper Carl Ikeme was stretchered off close to half time.
Ikeme has had stitches to a gashed knee in addition to bruising his hip and faces a race against time to be fit for Saturday’s mouthwatering local derby.
With fellow goalkeeper Matt Murray sustaining another injury while on loan at Hereford United, it leaves Hennessey as the likely choice to line-up for Saturday’s Championship top of the table showdown.
Hennessey admitted the chance to reclaim the goalkeeper’s jersey came quicker than expected.
He claimed: “As soon as I saw Carl go down, I started warming up and before I knew it, he was being stretchered off.
“It’s always tough as a goalkeeper coming on, but I was pleased to do so – but obviously it was with mixed feelings.
“I’m good mates with Carl and we’ve known each other for a long time.
“I’ve been there for Carl whenever he’s needed me.
“It has been difficult, but I want the best for Carl as well as myself.
“All I’ve been doing since I’ve been out of the team is training hard and supporting Carl.
“I’ve had to keep myself right because you never know what’s going to happen and that has been proved when I came off the bench.
“I had to make sure I was ready to take my chance – so it’s been a case of working hard and keeping myself ticking over.
“I hope Carl is OK and if he comes back fit and plays against Birmingham, I’ll support and encourage him all the way.
“But if I’m picked, then obviously I’ll be pleased”.