James Quintong, ESPN.com 9y

Tournament Challenge: 32 brackets intact after first six Friday games

After the first six NCAA tournament games Friday, all wins by the higher seed, there are now 32 perfect brackets remaining out of the 11.57 million entered in Tournament Challenge. There were 273 perfect brackets entering Friday's action.

One notable fact coming out of Friday's action: 61.7 percent of brackets picked at least one 12-seed to win in the Round of 64. However, the Buffalo Bulls' loss Friday to the West Virginia Mountaineers meant that no 12-seed survived for the first time since 2007. In contrast, just 35.6 percent of brackets picked at least one 13-seed to advance.

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