Arsenal manager Arsene Wenger says the Champions League semi-final defeat by Manchester United was the worst night of his career.
United beat Arsenal 3-1 in the second leg and 4-1 on aggregate as the Champions League trophy again eluded Wenger and the London club.
"It is the most disappointing night of my career," said the Frenchman.
"I felt the fans were really up for a big night and to disappoint people who stand behind the team so much hurts."
United added to their first-leg lead through Ji-Sung Park after eight minutes before Cristiano Ronaldo scored with a 40-yard free-kick three minutes later to all but end Arsenal's challenge.
Ronaldo added a second goal after the break, while a late Robin van Persie penalty for the Gunners - after Darren Fletcher was deemed to have fouled Cesc Fabregas - was little consolation for Wenger.
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"The most difficult thing is that we do not have a feeling that we played a semi-final of the Champions League," conceded Wenger.
"We were out of it after 10 minutes and we had 80 minutes to play against a team who defend well and wait to counter-attack. We were in a position where we had to take all the gamble after having started quite well.
"I must say we can only look at ourselves. It is very disappointing to fight to get such a long way and to give the game away like we did.
"We do not want to blame anyone individually. In three minutes we conceded two goals and it was too much.
"We were ready for a fight and the game but after 10 minutes it was impossible. We kept going and we did as much as we could. We played with pride and desire but of course some part of the belief had gone."
He added: "Manchester United over the two games deserved to go through.
"It could have been over after the first game. We had a good opportunity to come back but overall they were the better side."
Wenger called Fletcher's red card "harsh" and said referee Roberto Rosetti "had a very bad game".
But this will be the fourth season on the trot that Arsenal have failed to win a trophy and Wenger, despite providing his unyielding belief in his youthful side, said he would have to take stock on why his side came up short.
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