Upset Percentage

[Whatever]

Handy table for the odds of a perfect reverse bracket
50% odds of underdog winning-->Once every 128 tournaments
45% --> once every 268 tournaments (roughly 2 years)
40% --> once every 610 tournaments (roughly 4 years)
35% --> once every 1554 tournaments (roughly 10 years)
30% --> once every 4572 tournaments (roughly 30 years)
25% --> once every 16,384 tournaments (roughly 100 years)
20% --> once every 78,125 tournaments (roughly 600 years)