Daniel Sturridge rescued Chelsea from FA Cup humiliation but Andre Villas-Boas was let down by his players again as Birmingham secured a FA Cup fifth-round replay with a 1-1 draw at Stamford Bridge.
The home side's season was in danger of hitting a new low when their latest defensive calamity allowed David Murphy to give the visitors a shock half-time lead at Stamford Bridge.
Colin Doyle also brilliantly saved a Juan Mata penalty and although Sturridge eventually equalised, Chelsea simply did not do enough to find a winner.
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