Gabriel Martinelli saved a crucial penalty as the north London side lost to Sporting CP in a dramatic shootout at the Emirates last night.
However, the Arsenal manager has already set his sights on the Premier League, demanding his side bounce back against managerless Crystal Palace on Sunday.
He said: “It (sporting defeat) is a huge blow but it brings clarity to the season.
“We have 11 games to play, 11 Premier League games and a grand final against Crystal Palace.
“The focus has to be there and we have to learn from tonight.”
Martin Odegaard echoed his manager’s sentiments and is totally focused on the game against Palace, where a win could see the league leaders go eight points clear at the top when Manchester City face Burnley in the FA Cup at the Etihad on Saturday.
The Arsenal captain, who came on last night as a late substitute, revealed his side had already discussed the defeat and are ready to put it right.
He said: “We talked about it already in the dressing room. We have to move forward now.
We’ll have to see until Sunday. It already started in the dressing room and we are getting ready.
“We just have to change the way of thinking again. I think everyone is disappointed, but we have to move forward and just be ready for Sunday.”
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