https://www.espn.com/mens-college-basketball/story/_/id/48704864/ncaa-mens-women-basketball-tournaments-expand-76-teams
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The expansion from 68 teams to 76 teams marks the men's tournament's largest increase since it moved to 64 teams in 1985. It went from 64 to 65 in 2001 and then added three more teams in 2011 to form the First Four.
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Half of the 24 opening-round teams will be the lowest-seeded automatic qualifiers, the other the lowest-seeded at-large teams.
The traditional 64-team first round and ensuing rounds will remain the same in both the men's and women's tournaments.