Arsenal lost to Monaco 3-1 in the first leg of their Champions League tie.

Arsène Wenger was upset by how his team overcommitted to leveling the match and being exposed on the counterattack.

Wenger even suggested that complacency might have been a factor in the defeat. “It looks, when you have not that kind of sharpness, anything is possible,” the Arsenal manager said. “We were not at the level defensively. We were a bit unlucky as well because the first goal was deflected. But on the second and third goals, we were suicidal.

“We had the luck to come back to 2-1 and you do not have the right to give a goal away the way we did. That makes our task in the second leg extremely difficult. It looks like we have lost our nerves and our rationality on the pitch. The heart took over the head and, at this level, it doesn’t work. Mentally we were not ready, not sharp enough to get into this game. We paid for it.”