Arsenal midfielder Jack Wilshere has acknowledged that the Gunners were "not good enough" against Ostersunds FK.
"We were nowhere near it and not good enough," Wilshere told BT Sport after the game.
"We are through and that is all that counts. We will see who we get tomorrow and refocus on the big game on Sunday [the EFL Cup final].
"When you are 3-0 up in a two-legged game you have to go again. It is only half time and we maybe underestimated them a little. We were not good enough, we will accept that and move on. We are through, that is probably the only positive."