For some at Arsenal, it remains a 20-minute spell that still stands out as a surprise amid 20 years at the club. After Arsenal Wenger's team had been so thoroughly outclassed 3-1 by Bayern Munich in their 2012-13 Champions League last-16 tie at the Emirates, sources say the French manager sought out a solitary room in the stadium to ruminate on all that had happened. He didn't come out for over a quarter of an hour. Club sources at the time said it was something they hadn't really seen before.
At the time, that Bayern Munich team were trampling all over the rest out of Europe in successful pursuit of a sensational treble; it didn't seem like the type of defeat to warrant such severe introspection.