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 2014 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 9 Mar 2011