Is there a way to know what matches are from the upper or low bracket?

[slashinfty]

I assume you mean winner's and loser's brackets in double elimination? That code resides in the tournament-pairings package. It creates all winner's rounds, then places the loser's rounds after them. You can identify the first round containing loser's matches by looking at the loser's path in the first round matches.

[Ceneka]

Yeah, that's exactly what I was talking about! thanks