Here is how Arizona's loss destroyed most NCAA Tournament brackets

Loyola-Chicago guard Donte Ingram and Marques Townes right celebrate their 64-62 win over Miami in a first-round game at the NCAA college basket

A whole bunch of brackets spiraled down the drain Thursday night when No. 13 Buffalo defeated No. 4 Arizona 89-68 in the most surprising upset of the tourney so far.

At ESPN's pool, just 6,306 brackets remained flawless after the first 16 games. That's 0.036% of the 17.3 million total brackets entered.

Meanwhile almost 5 percent of the ESPN brackets picked Arizona to win it all. Just 36% of ESPN's users predicted Miami would lose in the first round. NCAA March Madness games also are available via streaming, mostly to authenticated pay-TV subscribers.

It's a huge drop from 2017, where there were still 154,000 flawless brackets at the end of day 1, according to ESPN Fantasy Sports.

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Also in the East Region, 41.3% of participants predict that No. 3 Texas Tech will beat No. 6 Florida in the Round of 32 and 26.2% pick Florida to prevail against Texas Tech.

Other notable first-round games on Thursday include No. 7 seed Rhode Island versus No. 10 Oklahoma in the Midwest Region and South Region 12-seed Davidson against the No. 5 Kentucky. It was Texas Southern coach Mike Davis' first NCAA Tournament win since 2006 when he was coach at Indiana.

Chances are, we'll see multiple upsets happen Friday, so expect the number of ideal brackets to decline more.

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