Arsene Wenger believes Arsenal's humbling at the hands of AC Milan on Wednesday night was their 'worst' performance in European competition.
The Gunners suffered a humiliating 4-0 defeat in the San Siro to all but end their hopes of progressing into the last eight of the Champions League.
Kevin- Prince Boateng opened the scoring with a quite stunning volley, before a brace from former Manchester City striker Robinho made it 3-0 shortly after half-time.
The impressive Zlatan Ibrahimovic completed the rout from the penalty spot, having been grounded in the box by first-half substitute Johan Djourou.
It was a truly dreadful display by Arsenal, and their inability to challenge Milan in the final third compounded the frustration of of the Gunners manager.
"It was of those nights you never forget. It is our worst night in Europe, we were punished and deservedly so," he told reporters after the game.
"We were very poor offensively and defensively. We were beaten everywhere. There was not one moment in the 90 minutes we were really in the game.
"What made it worse is that we had to chase the game. It was always the same problem, balls over the top and we were well beaten.
"It is difficult to analyse. I think it is better not to talk too much. We need to analyse with a cooler header and regroup for the next game."
Milan travel to the Emirates Stadium for the second leg of the Champions League last 16 encounter on March 6, and Arsenal will need to produce their finest of European performances to have any hope of progressing.