Goalkeeper Wojciech Szczesny admitted Arsenal were outclassed as they shipped four goals to all but end their Champions League hopes in the first leg of their last-16 tie with AC Milan.
Former Tottenham midfielder Kevin-Prince Boateng opened the scoring in the 15th minute before a brace from Robinho and a penalty from Zlatan Ibrahimovic turned it into a 4-0 rout.
"We didn't have the best of games but you have to give credit to Milan," Szczesny told ITV. "They punished us on every occasion and scored some quality goals. They deserved to win. It's a very disappointing day for us and hopefully we can pick ourselves up and challenge them in the second leg.''
With Thierry Henry making his final appearance for the club, most likely ever, before heading back to New York, the stage should have been set for Arsenal to put on a strong showing in this first leg, yet Szczesny insisted the players had gone out with the right attitude.
"I think everyone was up for it, and they knew how to play the game, but they were the better team on the night and that's the story of the day,'' he said.
"I don't think it's a surprise. They have some of the best attacking players in the world. When you're playing against Ibra, he's up there as the best striker we've playing against. They had quality up front and used it very well.
"We have to keep fighting, pick ourselves up, get the confidence back and challenge in the other competitions and in the second leg of this tie too.''