Grella missing for Blues trip

Published Dec. 14, 2009 8:25 p.m. ET

foxsports

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."