The first day of March Madness brought upsets, blowouts and an action-packed 13 hours of college basketball. Below is your guide to all 16 first-round games from Day 1 of the men's 2025 NCAA tournament, complete with analysis from on-site reporters of how each game was won, and our experts' takes on each winner's chances to advance to the Sweet 16.

March Madness live updates, scores, highlights: Follow all NCAA tournament Day 1 action as Creighton, Louisville tip off

Big upsets are arguably one of the most exciting parts of March Madness, despite the pain it might bring your already-busted bracket.

For the first time, fans could place their bets on the first day of March Madness games at the Potawatomi Sportsbook.

March Madness also draws attention from sports bettors. While the Super Bowl is the most wagered-on single game, the NCAA Tournament brings in more total money due to the sheer number of games. According to the American Gaming Association,