Princeton guard Abby Meyers drives against Kentucky in the first round Saturday. (Jeremy Hogan/SOPA Images/LightRocket via Getty Images)

Day 2 of the NCAA Women’s Basketball Tournament was punctuated by a series of upsets, throwing brackets into chaos heading into the second round.

No. 9 Kansas State 50, No. 8 Washington State 40

Kansas State defeated Washington State 50-40 on Saturday to advance to the second round of the NCAA Tournament. Both teams struggled on offense, with Kansas State shooting 26.4 percent to Washington State’s 25 percent. Ayoka Lee led the Wildcats with 20 points and 15 rebounds, while Brylee Glenn added 14 points and four rebounds.

Kansas State will meet No. 1 NC State in Raleigh on Monday.

No. 11 Villanova 61, No. 6 BYU 57

Villanova upset BYU 61-57 on Saturday thanks to a strong second half. Wildcats leading scorer Maddy Siegrist led the team with 25 points, seven rebounds and three assists, while Kaitlyn Orihel added 10 points and four rebounds off the bench.

Villanova will face No. 3 seed Michigan in the second round Monday in Ann Arbor.

No. 11 Princeton 69, No. 6 Kentucky 62

No. 11 seed Princeton stunned No. 6 seed Kentucky 69-62, bouncing the SEC tournament champions in the first round. The Tigers dominated the game from the opening whistle, outshooting the Wildcats 49.1 to 35.7 percent and out-rebounding them 37-30. The win was Princeton’s second in the NCAA Tournament and first since 2015.

Next, Princeton will take on No. 3 Indiana on Monday in Bloomington.