<Li> In 1997, Arizona achieved a record when it became the only team to beat three No. 1 seeds in a single tournament . Arizona (No. 4 seed) beat Kansas in its own Southeast region, then beat North Carolina in the Final Four and finally Kentucky in the Championship game . The most No. 1 seeds any team can face in the tournament is three (provided that the team itself is not a No. 1 seed, in which case it can only face two No. 1 seeds in the tournament). </Li> <Li> In 2011, the highest seed to advance to the Final Four was No. 3 seed Connecticut, making the 2011 tournament the only time that neither a No. 1 seed nor a No. 2 seed advanced into the final weekend of play . In the same tournament, Butler made history as the first program to make consecutive Final Fours while not being seeded No. 1 or No. 2 in either season . </Li> <Li> There have been 16 teams that have entered the tournament unbeaten . Four of those teams were from UCLA, and all those Bruin teams won each of those tournaments . However, of the other 12 teams entering the tournament unbeaten, just three went on to win the tournament . For details, see table below </Li> <Li> In 1980, 1981, and 1982, when the tournament was 48 teams, DePaul was seeded No. 1 but was defeated in the first round . </Li>

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