Do you follow Arsenal.com on Twitter?
If you're one of the 175,000-plus people who do, we want to hear from you after Saturday's game against Legia Warsaw.
The game was shown live on Arsenal TV Online and now we're asking you to tweet your reaction to @ArsenalDotCom.
We'll publish a selection of the fans' post-match tweets on Arsenal.com on Monday.
If you don't already follow us on Twitter and want to have your say, you can find us here: @ArsenalDotComCopyright 2015 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