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Sunday, March 11, 2012
Tournament Challenge: Let it begin

By ESPN.com staff

Tournament Challenge opened for business around 7 p.m. ET and in the first three and a half hours, there were around 630,000 brackets already filled out.

Kentucky is the most popular pick to win it all so far, being named the champ on 32.1 percent of brackets, followed by North Carolina (15 percent) and Syracuse (11.2 percent). Interestingly, Missouri, a No. 2 seed, is fourth on the list at 7.7 percent, ahead of Michigan State (6.7 percent), the No. 1 seed in Mizzou's bracket.

The top 10 teams to win it all:

Kentucky: 32.1 percent
North Carolina: 15 percent
Syracuse: 11.2 percent
Missouri: 7.7 percent
Michigan State: 6.7 percent
Kansas: 5.8 percent
Ohio State: 4.1 percent
Duke: 3.9 percent
Florida State: 2.8 percent
Baylor: 1.5 percent

Kentucky (65.5 percent) and North Carolina (52.9 percent) are the only teams to reach the Final Four in more than 50 percent of brackets. Also, 18.3 percent of entries have Kentucky and North Carolina meeting in the championship game; 12 percent have a Kentucky-Syracuse final.

Among notable early returns from the Round of 64 predictions: