Here's a breakdown of the new 68-team format for the NCAA men's basketball tournament:
First round: Now includes four games to determine the 64-team main draw.
Two 16th seeds: Determined by two games involving teams rated 65th to 68th in the field, all of which likely will be small schools that earn automatic berths. Winners will play a No. 1 seed in the second round.
Two at-large seeds: Determined by two games involving the last four at-large teams rated 34th to 37th among at-large selections. They will be playing for a seed in the 64-team main bracket likely ranging from a 10 to a 12, which would match them against teams seeded No. 7 to No. 5 in the second round.
The 64-team main draw: After the "First Four" games, the remaining 64-team field plays second-round games on Thursday-Friday of the opening week and third-round games on Saturday-Sunday.