Birmingham have made their tenth signing of the summer in landing Arsenal's Johan Djourou on loan.
The Switzerland international, who joined The Gunners from Swiss club Etoile Carouge in summer 2003, made 21 Premier League appearances last season.
However, Arsene Wenger has allowed the Ivory Coast-born defender to continue his education at St Andrew's following the arrival of Bacary Sagna.
Blues boss Steve Bruce believes Djourou has a long Arsenal future ahead of him.
"I honestly think that Djourou can be an Arsenal defender for 10 years," stated Bruce. "I am delighted Arsene Wenger has allowed Johan to join us.
"He has got strength, pace, great ability on the ball, is a very good footballer and is comfortable at the back and in midfield.
Birmingham have signed Djourou in time for him to be in contention to make his debut against Chelsea in this weekend's season opener.