Millions of Americans have been scrambling to finalize their men’s and women’s college basketball brackets ahead of the tip-offs of a weeks-long sporting spectacle that will see people wager billions of dollars.

Sixteen games across the country Thursday opened up the first round of the 2025 NCAA Tournament and probably to some extent busted at least part of your March Madness bracket in the process. Maybe you picked High Point to take down Purdue or thought No.

Whether you're cheering for your favorite team or making a bracket for fun, here's what you need to know about March Madness 2025.