Grella missing for Blues trip

The Australian was substituted before half-time in Saturday’s

goalless draw at Hull with a groin strain. Manager Sam Allardyce

took the player off as a precaution and admits he is unlikely to

risk him at St Andrew’s. Allardyce said: “If you leave him on it

extends the injury even more or he could tear it rather than feel

it tight. “We can probably rule him out for Birmingham but I don’t

think any longer than that.”