If the losers’ bracket champion wins the first final, you’ll need another match. Don’t schedule something else immediately after.
Have you run an 18-team double elim before? Share your tips or horror stories in the comments! 18 team double elimination bracket
(starts after WB R1 losses)
Because 18 is not a power of 2 (16, 32, etc.), you’ll use in the first round of the winners’ bracket. If the losers’ bracket champion wins the first