Arsenal boss Mikel Arteta says their elimination from the Europa League is a "huge blow" after their penalty shootout against Sporting Lisbon.
Finishing 1-1 on the night, the Gunners were eliminated on penalties in the round of 16.
Arteta said, "A huge blow obviously. There were moments in the first 75 minutes where we weren't at our level. We gave every ball away and we didn't have the capacity to take the game. There were chances to win it in extra-time. There was a lot of uncertainty with the pens.
"It was a very difficult game.
"We didn't win enough duals in certain spaces. We didn't put the ball under pressure well enough. We gave the ball away consistently and it created a really open game we didn't want to play.
"Injuries happened with Tomiyasu and Saliba. We are really restricted with the changes because we only have one window to do one and we didn't have the subs left.
"We had big chances to finish the game off.
"We just have to look at ourselves and why we were not good enough to go through. We congratulate Sporting and now we have 11 games. Our next game with Palace is a final. Every work we do right now has to be towards Palace and we have to be better than in this game."