Arsenal boss Arsene Wenger was delighted with the character shown for their FA Cup win over Aston Villa.
Captain Robin van Persie netted twice from the penalty spot as the Gunners beat Aston Villa 3-2 to book their place in the fifth round.
Wenger said: "I was very impressed because I felt that when you come out of a bad period like we are, and you are 2-0 down, you can feel sorry for yourself or you can show you have the mental qualities to play for this club.
The Gunners boss added: "That is was a good test to show that we had the mental qualities to come back. On the other hand it was important that we didn't panic.
"To concede a goal just on half-time for 2-0 was a difficult blow, but we responded very well against Manchester United here and we did it again on Sunday.
"Overall it was a classic FA Cup tie in England: 2-0 down and coming back, we had to fight to score three goals and we did it well.""I was very proud the team came out playing on all cylinders and showed they are not ready to lie down."