Tomas Rosicky has urged Arsenal to bounce back from the "big mistake" which cost them their chance of ending a six-year trophy drought at Wembley.
A mix-up between Wojciech Szczesny and Laurent Koscielny gifted Obafemi Martins the winner in Birmingham's 2-1 victory over the Gunners in the Carling Cup final.
Although Arsenal are still fighting for honours in the Barclays Premier League, the FA Cup and the Champions League, the occasion was seen as the best chance for the club to win a trophy this season.
Rosicky insists the club must forget the incident quickly, saying: "Obviously we are very disappointed but we have to pick ourselves up immediately. We have a game on Wednesday so we have to perform."
He added: "The big games are decided by who makes the most mistakes, and we made the big mistake."
"The season doesn't finish now. We are still in a good position in other competitions so we have to quickly try to forget this and concentrate on other stuff.
"It's very important to go through to the next round. We have to try to forget about this and move on."
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