If you are from another clan and wish to challenge EU to a match, post a topic in this forum. In your post you should include:
Name of your clan
Reason for challenge
Max. players for each team
date & time
ip of server the match will be played on
Any other comments you feel relevant
EXAMPLE
Clan name: a clan
we want to challenge EU, because we want to practice
Max. players: 5 per team
12/12/2012, 9 PM GMT
[ip of server]
bring it on!!!
Feel free to add other details to your challenge and/or change the way you tell us this information.