Interesting point, pajada! But there is another way in which you can have more variety which is if your previous opponent wins in group 1 or loses in group 10. In fact if they lose in group 10, they are out next round.
But that said, this is a good argument for keeping the group size small. Otherwise there are more players stuck in the middle playing the same 2 opponents.
Update for this round: I'm finally enforcing the rule mentioned about losing in group 10. Pelej lost for a 3rd time and I would like fresh blood in here π Welcome, Firedart.