The men's field of 68 is set for the greatest postseason in sports: March Madness. Sunday's selection show revealed the 2021 bracket that sets the table for this year's race for the national title. Gonzaga enters the tournament as not only the No. 1 overall seed, but also chasing the first undefeated season by a D-I men's basketball team since 1975–76 Indiana.
Before the games begin (the First Four is Thursday, while the Round of 64 starts Friday), SI's experts have broken down the teams to watch in each region, from the outlook for the top seeds to the squads most likely to make a Cinderella run and much, much more.