Town defender Damien Delaney is expected to be out of action for around six weeks after undergoing surgery on the stress fracture of his foot he suffered during the recent defeat to Crystal Palace.
Boss Paul Jewell said: "Damien has a stress fracture of his foot and he's going to be out for a little while.
"He had an operation yesterday and he will be out for a while, maybe six weeks or so, but I'm not sure on an exact timescale so we will have to just wait and see."
The Blues boss has had better news regarding Lee Bowyer, Daryl Murphy and Nathan Ellington: "Lee Bowyer and Daryl Murphy did some running with the physios today, so those two are progressing nicely, and Duke's calf is OK now.”
Bowyer had been suffering with back and hamstring problems, while Murphy pulled his hamstring in the reserves defeat to Arsenal last Tuesday.