After Arsenal's 3-1 defeat at Barcelona on Tuesday, we asked fans to share their thoughts on the game via Twitter.
Many of you got in touch and below is a selection of the fans' thoughts.
If you don't already follow us on Twitter and want to have your say, you can find us here: @Arsenal
@andresinjunior - We have to keep our heads up and win the Premier League and FA Cup.
@rantonika - We need the referees to be humans, not robots.
@jimpow77 - I think we missed Theo Walcott, he made a massive difference in the first leg.
@jiimii33 - With 11 men in the second half it would have been a different stroy.
@futobolica - Arsenal have shown the world that they have grown up both physically and mentally. Unfortunately decisions cost us a win.
@hokinchan - There were some soft yellow cards against us. Nasri and Wilshere copped some hard challenges and the Barca players got away with it.
@DebbieB48 - We would have gone through with 11 men.
@ian__godfrey - Absolutely disgraceful refereeing! Other than that we played excellently, there's still a double up for grabs.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