I just ran the calculations guys…
Guaranteed NA matchup for first 2 rounds in M3 Berlin: 1/3 (Envy and 100T on same side of bracket) x 1/2 (sentinels playing either Envy or 100T) = 1/6
Round 1 NA matchup in M1 Iceland: (Guard was 1st seed, Optic was 2nd, only 4 potential teams for optic to play against) = 1/4
Round 1 NA matchup in M2 Copenhagen: (XSet was 1st seed, Optic was 2nd, only 4 potential teams for optic to play against) = 1/4
Guaranteed NA matchup for first 2 rounds in Champs 2022: 1/3 (Optic and XSET on same side of bracket) x 1/2 (100T playing against one of them) = 1/6
1/6 x 1/6 x 1/4 x 1/4 = 1/576 or 0.17% chance
the raw chance of 1 of these matchups happening isn't what pisses me off, it's the fact that ALL of them have happened and riot claims these brackets are randomized. the only time NA didn't have a round 1 matchup in playoffs was in Masters 2 Iceland, but NO region had a round 1 matchup.