Mikel Arteta says the Europa League is "all or nothing" for Arsenal ahead of his side's quarter-final first leg with Slavia Prague.
With the Gunners 10 points off a top-four spot, winning the Europa League is their most realistic chance of playing in next season's Champions League.
"We want to be in the semi-finals and we know how important the game is for us," added Arteta.
Full-back Kieran Tierney is facing up to six weeks out with a knee injury.
Is Tierney's season over?
At his pre-match conference on Wednesday, Arteta was unable to assure Arsenal supporters that Scotland defender Tierney will play for the club again this season.