No. 1 seed Kansas faces No. 2 seed Villanova in the first national semifinal, followed by the first game Duke and North Carolina have ever played in the N.C.A.A. men’s tournament, for a berth in the championship game.
On Friday, Louisville and South Carolina face off in a matchup of No. 1 seeds, followed by No. 2 Connecticut against No. 1 Stanford. The women’s national championship game is Sunday.