Unai Emery admits Arsenal ‘didn't do enough’ to beat Eintract Frankfurt as the German side came from 1-0 down to beat the Gunners 2-1 at the Emirates and delay their qualification to the Europa League round of 32.
The London club are now winless in their last seven matches - the first time they have had such a run since 1992.
Despite the loss, Emery says Arsenal will hope to gain the backing of the fans as they aim to qualify for the next round of the competition in their final group game at Standard Liege on 12 December.
"Tonight wasn't our moment but we won a lot of matches to be top of the group. Our aim is to win away to Standard Liege to finish as first.
"We want to do that to build our confidence and connect with the supporters. We need to win and we lost a very good opportunity. We didn't do enough to win this match."
Club captain Pierre-Emerick Aubameyang gave Arsenal the lead on the stroke of half time, before the away side hit back after the restart.
Daichi Kamada scored twice in nine minutes to turn the game on its head and Arsenal appeared to have no answer or ideas of how to get back into the match, with Emery stating they lost their grasp on the game in the second half.
"We lost our control of the game for 15 minutes of the second half, and they scored two goals.
"Then we had injuries, and Mustafi going off meant I wasn't able to make changes. We were better in the first half but in those 15, 20 minutes we lost control."
Boos rang around the Emirates after the full-time whistle as the pressure is ramping up on manager Unai Emery, with many fans calling for him to be sacked.
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