Aaron Ramsey says Arsenal paid the price for "switching off" against Borussia Dortmund on Tuesday night.
Arsène Wenger's side were in the ascendancy when they were caught on the counter-attack eight minutes from time as Robert Lewandowski’s goal inflicted a 2-1 defeat at Emirates Stadium.
Ramsey accepted responsibility for Dortmund's first-half opener but believes that Arsenal still did enough to take at least a point.
I was disappointed as well with the way they scored their first goal, I got caught on the ball
"A draw would have been a fair result after the way we played in the second half," he told Arsenal Player.
"I felt like we were in control of the game but then we switched off for 30 seconds, we were in their box and 30 seconds later the ball is in the back of our net.
"I was disappointed as well with the way they scored their first goal, I got caught on the ball and that was disappointing. We were a bit slow to start but I thought after about 25 minutes we got into the game, we got our goal and then we took that into the second half.
"We were in control of the game, we didn't look like we were going to concede, but then we did. That's what happens [when you switch off].
"We showed good character getting back into game… and we created a few chances in the second half and hit the bar. On another night we may have taken the lead but we have to learn from the way we defended for the second goal."Copyright 2016 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source