Quote Originally Posted by pnr8555 View Post
League - All of your friends in your level, and friends of your friends. If there is not enough players then random players will be in your league
Champions League - You'll be with 1 random friend in your level who qualified, the rest are random players.
Cup - All players in your server.
This is not always the case. In the cup, you are correct, but as regards the league and CL. They do place some of your friends into a league with you, but not ALL of them. Last season I was in a league with 9 friends and 4 strangers, despite the fact that I had another 6 friends in my server and on the same manager level.

As regards the CL, this season I have had 5 friends playing in my competition (2 of them are still there).