History of 9 seeds vs. 8 seeds in March Madness

The 8-9 matchup is, as you'd expect, the toughest March Madness matchup to pick. Here's the entire history of 8s and 9s in the NCAA tournament.

source https://www.ncaa.com/news/basketball-men/article/2020-02-23/history-9-seeds-vs-8-seeds-march-madness