Arsenal were beaten 1-0 by Paris St-Germain in the Champions League semi-final first leg at Emirates Stadium.
Mikel Arteta's side had good chances through Gabriel Martinelli and Leandro Trossard but could not find a goal to level the match.
Here, BBC Sport looks at what was learned from the match.
The biggest challenge for Arteta coming into this match was how he was going to set up in the absence of suspended midfielder Thomas Partey.
The 31-year-old is a key part of the Gunners midfield and picked up a cheap yellow card in the final few minutes of the match with Real Madrid in the quarter-final which meant he missed this game.