ESPN’s Bracketology efforts are focused on projecting the NCAA Tournament field, just as we expect the NCAA Division I basketball committee to select the field in March. ESPN bracketologist Charlie Creme uses the same data points preferred by the committee, including strength of schedule and other season-long indicators, including NET and team-sheet data similar to that available to the NCAA, in his projections of the field. Visit the NCAA website for a better understanding of NCAA selection criteria.
The 64-team bracket is the standard version of the NCAA Tournament field that has been in place since 1994. If the 2021 field is made up of 64 teams, however, there will be some key differences from previous years.
The primary adjustment from a normal year is, of course, the playing of the entire NCAA tournament in a single location. This eliminates the need for geographic considerations when seeding. In addition, there will be at least one less automatic qualifier this season as the Ivy League’s decision to forgo the 2020-21 season reduces the number of AQ entries to 31 for this season.
In this projection, a condensed selection process would reduce the field to eight at-large teams and eight automatic qualifiers (the latter of which still receive a revenue unit). The top four seeds in each region would receive a second-round bye, with four first-round games each. region – 5 vs 12, 6 vs 11, 7 vs 10 and 8 vs 9.
In this projection, the committee selects and seeds the 16 best available teams. There are no automatic qualifiers, although all non-contest conference champions receive the designated revenue unit.
To maintain some sense of national balance, conference participation is limited to four teams. And no region may have more than one team from the same conference.