well that's not easy to explain ...
If I understand you've got the "QUALIFYING COMPETITION WINNERS ADVANCE TO THE MAIN DRAW ELIMINATION ROUND" where you find 16 players including 3 WC... those players play 2 round and the last 4 "winners" are qualified for the "MAIN DRAW ELIMINATION ROUND"
in this draw you've got the last 8 players of the "entry list" + 3 others WC... here you play one match to qualify for the Round robbin ...
In the RR, you've got 8 groups. each player of the main draw elimination round is distributed in one group. Each player play 2 matches and then the winner of each group is qualify for the "FINAL ROUND".
for example, if Pim beats Simon and Serra, he will face the winner of the group 3
am i clear