I'll say the same thing I said to SoF...
Welcome! We are currently working out rules on how US and EU clans can face each other in a fair hosting way. I also want to note, in the US we do not allow double/triple/etc clanning for competitive play. I honestly don't care if a player remains in two clans and cannot control that. But competitively, if you have members in multiple clans, they would need to pick one to compete in on here.