One game into the 2014 NCAA Men's Basketball tournament, and brackets were already ruined with 11-seed Dayton upsetting 6-seed Ohio State.

Just hours later 12-seed Harvard won a tournament game for the second straight year, knocking off 5-seed Cincinnati.  

The upsets are a thing of beauty, and make the tournament what its is. 

With so many memorable first round upsets and close calls, it can be tough to narrow down the best, but here are the most shocking round of 64 (formerly first round) upsets in tournament history.

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