May 2006: Lose to Barcelona in Champions League final – After a very impressive run through the competition where they knocked out Real Madrid and Juventus and did not concede a goal after the group stage, Arsenal were entitled to feel like they could win the competition. Even after keeper Jens Lehman was sent off 18 minutes in, Arsenal took the lead. Yet a late charge by Barcelona won them the game 2-1. This was a difficult defeat for Wenger to take.