Arsenal U18 coach Kwame Ampadu admits he didn't see their FA Youth Cup elimination coming.
The Gunners lost 1-0 at home to Blackburn Rovers on Friday night.
Ampadu told Arsenal Player: "They have to learn from this. Perversely, this is part of their development.
"If they want to become top-class professional footballers they're going to be going into cup situations quite a bit and it's going to be win or lose. This is something that they have to learn to deal with and dust themselves down and go again."