Board Thread:Game Discussion/@comment-64.56.248.22-20130711172318/@comment-2067839-20130711173810

Gree's algorithm for what arena opponents it will offer you is a great mystery, and possibly buggy. I haven't found a way to force it to refresh the list. Sometimes restarting the app will do it; sometimes just waiting an hour; sometimes I've left it and come back four hours later and they're still the same.

I've been told that losing a bunch of fights in a row will force it to give you lower-ranked opponents. I haven't tried that.

One useful trick: if there's a player in your opponent list that you know you can't beat, and you have them in your friend list, you can fight them in a friend battle and that will remove them from your opponent list. (Though there's no guarantee they won't come right back the next time it refreshes.)