Chelsea boss Andre Villas-Boas must overcome a Birmingham City curse in their FA Cup replay.

Defeats at the hands of City have cost FOUR managers their jobs this season as Sven Goran Eriksson, Steve McClaren, Simon Grayson and ex-Brugge boss Adrie Koster all went after losing to Chris Hughton's men.

Birmingham goalkeeper Colin Doyle said: "We will be confident bringing them back to our place. The pitch will probably suit us rather than them, so ­hopefully we can do it.

"They are not doing too well and we were confident coming into the game. We got a draw and maybe could have got a win.

"It was quite unlucky we didn't win it, but we are just pleased we have got the result and are taking them back to our place."