It's not, Wen says that it's a bracket where even if you lose a fight, you can make it to the top 3 winning the other ones. What's not very clear if how many competitors there are in the bracket and what happens after you make it to the top 3. Maybe it's a kind of play-off with loser bracket where you can lose once and if you win everything you end up in a fight against the loser of the winner's bracket for a place in the final.If it's a single-elimination tournament, at least 8 fighters are needed. Top 4 for the semi, and Top 2 for the grand finale.