Manuel Almunia to start in goal
The pair gifted the League Cup to Birmingham City on Sunday afternoon after a communication breakdown but Szczesny is expected to make the bench for the game.
Centre-back Koscielny will miss out with a tight hamstring and Szczesny will be rested to give some game time to outcast Manuel Almunia.
Wenger says he hopes Koscielny's confidence doesn’t drop after the mistake in Sunday’s final.
“He takes everything on board and we don't want his confidence to drop,” said his manager.
“He made a mistake and he's angry about it. We have to show we support him and believe he is a fantastic player."