Steve Bruce's latest return to St Andrew's ended in stalemate as League One leaders Birmingham were held to a goalless draw by Blackpool.
The result ended City's eight-match winning streak in all competitions but worse was the injury to their left-back Lee Buchanan.
Blackpool – managed by ex-City boss Bruce – were denied a third-minute lead.
Kyle Joseph's clean-through shot was blocked by goalkeeper Ryan Allsop.
Buchanan, who made a block, looked like he suffered a serious knee injury, and there was a six-minute delay before he was taken off on a stretcher.
Birmingham's only chance of the first hour was a low drive from Emil Hansson that Harry Tyrer palmed away.
Blues had another let off when Tyrer's kick gave Ashley Fletcher a one against one, but his lob was deflected over.
The Tangerines almost scored in the 57th minute when Joseph fired against the inside of a post from a tight angle.
Birmingham substitute Jay Stansfield's deflected shot was hacked off the line by Odeluga Offiah near the end.
Report supplied by PA Media.
