Arsenal “mentally collapsed” in their Champions League last 16 first-leg hammering at Bayern Munich, said manager Arsene Wenger.
The Gunners suffered a 5-1 defeat at the Allianz Arena, which included four second-half goals after they lost defender Laurent Koscielny to injury.
It leaves them facing elimination in the first knockout round for a seventh successive season.
“It’s difficult to explain,” Wenger told BT Sport.
“Just before half-time we had two good chances to score. We came back and played well.
“In the second half we lost Koscielny very quickly – he came off at 1-1 – and finally we collapsed. Bayern are a better team than us as well.
“I felt the third goal was a killer for our players because after that we had no response.”