Bacary Sagna has hit out at Arsenal teammates.
The France fullback is upset over the way they have been conceding goals.
A cock-up between Wojciech Szczesny and Laurent Koscielny saw Birmingham snatch a last-minute winner in the Carling Cup final.
"When you see the goals we've let in since the start of the season, 40 per cent of them are from mistakes," Sagna said.
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