Photos: Scenes from Day 1 of the men's NCAA tournament
Furman forward Jalen Slawson (20) battles with Virginia forward Jayden Gardner (1) and guard Kihei Clark (0) for a loose ball during the first half of a first-round college basketball game in the NCAA Tournament Thursday, March 16, 2023, in Orlando, Fla. (AP Photo/Chris O'Meara)
Furman guard JP Pegues (1) tries to cut around Virginia guard Kihei Clark (0) during the first half of a first-round college basketball game in the NCAA Tournament Thursday, March 16, 2023, in Orlando, Fla. (AP Photo/Chris O'Meara)
Furman forward Jalen Slawson (20) and Virginia guard Kihei Clark (0) dive on the floor for a loose ball during the first half of a first-round college basketball game in the NCAA Tournament, Thursday, March 16, 2023, in Orlando, Fla. (AP Photo/Phelan M. Ebenhack)
Texas forward Dylan Disu celebrates after making a basket in the second half of a first-round college basketball game against Colgate in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Texas guard Marcus Carr (5) drives up court past Colgate guard Braeden Smith, left, in the second half of a first-round college basketball game in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Texas guard Tyrese Hunter, center, shoots over Colgate guard Braeden Smith, left, and forward Keegan Records, right, in the second half of a first-round college basketball game in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Texas' Christian Bishop dunks during second half of a first-round college basketball game against Colgate in the NCAA Tournament Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Louisiana guard Jalen Dalcourt (5) goes up for a shot as Tennessee forward Jonas Aidoo and guard Santiago Vescovi, right, watch during the second half of a first-round college basketball game in the men's NCAA Tournament, Thursday, March 16, 2023, in Orlando, Fla. (AP Photo/Phelan M. Ebenhack)
Northern Kentucky forward Chris Brandon (21) defends against Houston forward Jarace Walker (25) during the second half of a first-round college basketball game in the men's NCAA Tournament in Birmingham, Ala., Thursday, March 16, 2023. Houston won 63-52. (AP Photo/Rogelio V. Solis)
Tennessee guard Santiago Vescovi (25) and forward Uros Plavsic (33) defend against Louisiana forward Jordan Brown (21) during the second half of a first-round college basketball game in the men's NCAA Tournament, Thursday, March 16, 2023, in Orlando, Fla. (AP Photo/Phelan M. Ebenhack)
Auburn guard Allen Flanigan (22) attempts an off-balance layup against Iowa during the first half of a first-round college basketball game in the men's NCAA Tournament in Birmingham, Ala., Thursday, March 16, 2023. (AP Photo/Rogelio V. Solis)
Colgate guard Braeden Smith (2) drives past Texas guard Tyrese Hunter (4) in the first half of a first-round college basketball game in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Northwestern guard Brooks Barnhizer (13) shoots over Boise State guard Chibuzo Agbo (11) and center Lukas Milner (25) during the first half of a first-round college basketball game in the NCAA Tournament in Sacramento, Calif., Thursday, March 16, 2023. (AP Photo/Randall Benton)
Boise State forward Tyson Degenhart (2) battles Northwestern forward Tydus Verhoeven (10) and guard Boo Brie (0) for a loose ball in the first half of a first-round college basketball game in the NCAA Tournament in Sacramento, Calif., Thursday, March 16, 2023. (AP Photo/José Luis Villegas)
Colgate head coach Matt Langel watches from the bench in the first half of a first-round college basketball game against Texas in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Texas guard Marcus Carr, center, passes between Colgate forward Keegan Records, left, and guard Oliver Lynch-Daniels, right, in the second half of a first-round college basketball game in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Auburn center Dylan Cardwell reacts after a basket against Iowa during the second half of a first-round college basketball game in the men's NCAA Tournament in Birmingham, Ala., Thursday, March 16, 2023. Auburn won 83-75. (AP Photo/Butch Dill)
St. John's guard Jayla Everett (4) reacts after hitting the game winning shot against Purdue in the second half of a First Four women's college basketball game in the NCAA Tournament Thursday, March 16, 2023, in Columbus, Ohio. St. John's won 66-64. (AP Photo/Paul Sancya)
Iowa forward Payton Sandfort reacts after a foul call during the second half of the team's first-round college basketball game against Auburn in the men's NCAA Tournament in Birmingham, Ala., Thursday, March 16, 2023. Auburn won 83-75. (AP Photo/Butch Dill)
Colgate guard Tucker Richardson (15) fights for a loose ball with Texas guard Sir'Jabari Rice, right, in the second half of a first-round college basketball game in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Texas guard Marcus Carr, left, drives to the basket past Colgate guard Tucker Richardson (15) in the second half of a first-round college basketball game in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Auburn guard Allen Flanigan (22) dribbles the ball past Iowa guard Connor McCaffery (30) during the second half of a first-round college basketball game in the men's NCAA Tournament in Birmingham, Ala., Thursday, March 16, 2023. Auburn won 83-75. (AP Photo/Rogelio V. Solis)
Auburn guard K.D. Johnson (0) shoots in front of Iowa forwards Patrick McCaffery (22) and Payton Sandfort (20) during the second half of a first-round college basketball game in the men's NCAA Tournament in Birmingham, Ala., Thursday, March 16, 2023. Auburn won 83-75. (AP Photo/Rogelio V. Solis)
Furman guard JP Pegues (1) celebrates while leaving the court after their win against Virginia in a first-round college basketball game in the NCAA Tournament, Thursday, March 16, 2023, in Orlando, Fla. (AP Photo/Phelan M. Ebenhack)
Furman guard Mike Bothwell, right, gets emotional after their win against Virginia in a first-round college basketball game in the NCAA Tournament, Thursday, March 16, 2023, in Orlando, Fla. Furman beat Virginia 68-67. (AP Photo/Phelan M. Ebenhack)
Kansas guard Dajuan Harris Jr. loses the ball out of bounds in front of Howard guard Bryce Harris (34) in the second half of a first-round college basketball game in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Howard forward Shy Odom reacts after being called for a foul in the second half of a first-round college basketball game against Kansas in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Kansas guard Gradey Dick reacts after a teammate's 3-point basket in the second half of a first-round college basketball game against Howard in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Howard guard Elijah Hawkins drives around Kansas guard Dajuan Harris Jr., right, in the second half of a first-round college basketball game in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. Kansas won 96-68. (AP Photo/Charlie Neibergall)
Kansas' Gradey Dick shoots past Howard's Steve Settle III during first half of a first-round college basketball game in the NCAA Tournament Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Morry Gash)
San Diego State forward Jaedon LeDee (13) is surrounded by Charleston guard Dalton Bolon (3), forward Raekwon Horton (5), and guard Ryan Larson (11) during the first half of a first-round college basketball game in the NCAA Tournament Thursday, March 16, 2023, in Orlando, Fla. (AP Photo/Chris O'Meara)
Arizona guard Kerr Kriisa (25) shoots between Princeton forward Zach Martini (54) and teammate guard Matt Allocco (14) during the first half of a first-round college basketball game in the NCAA Tournament in Sacramento, Calif., Thursday, March 16, 2023. (AP Photo/José Luis Villegas)
Arkansas's Anthony Black drives by Illinois's RJ Melendez during the second half of a first-round college basketball game in the NCAA Tournament Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Morry Gash)
Princeton head coach Mitch Henderson embraces guard Matt Allocco (14) after their first-round college basketball game victory over Arizona in the NCAA Tournament in Sacramento, Calif., Thursday, March 16, 2023. Princeton won 59-55. (AP Photo/José Luis Villegas)
Arizona guard Adama Bal (2) leaves the floor with teammates following a first-round college basketball game loss to Princeton in the NCAA Tournament in Sacramento, Calif., Thursday, March 16, 2023. Princeton won 59-55. (AP Photo/José Luis Villegas)
Princeton players celebrate after winning a first-round college basketball game against Arizona in the men's NCAA Tournament in Sacramento, Calif., Thursday, March 16, 2023. Princeton won 59-55. (AP Photo/Randall Benton)
Arkansas's Ricky Council IV dunks during second half of a first-round college basketball game against Illinois in the NCAA Tournament Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Morry Gash)
Princeton guard Matt Allocco (14) forward Zach Martini (54) and forward Caden Pierce (12) and teammates embrace in the final seconds of the second half of a first-round college basketball game against Arizona in the NCAA Tournament in Sacramento, Calif., Thursday, March 16, 2023. Princeton won 59-55. (AP Photo/José Luis Villegas)
Arizona guard Courtney Ramey (0) looks up at the scoreboard during the second half of a first-round college basketball game against Princeton in the NCAA Tournament in Sacramento, Calif., Thursday, March 16, 2023. Princeton won 59-55. (AP Photo/José Luis Villegas)
Virginia forward Kadin Shedrick reacts as he leaves the court after the team lost to Furman in a first-round college basketball game in the NCAA Tournament Thursday, March 16, 2023, in Orlando, Fla. (AP Photo/Chris O'Meara)
Furman guard JP Pegues, third from right, celebrates with the team after defeating Virginia in a first-round college basketball game in the NCAA Tournament Thursday, March 16, 2023, in Orlando, Fla. (AP Photo/Chris O'Meara)
Howard guard Elijah Hawkins drives to the basket past Kansas guard Dajuan Harris Jr., right, in the first half of a first-round college basketball game in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Kansas acting head coach Norm Roberts directs his team in the first half of a first-round college basketball game against Howard in the NCAA Tournament, Thursday, March 16, 2023, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
West Virginia guard Kedrian Johnson (0) looks for an open shot as Maryland forward Julian Reese (10) defends in the second half of a first-round college basketball game in the NCAA Tournament in Birmingham, Ala., Thursday, March 16, 2023. Maryland won 67-65. (AP Photo/Rogelio V. Solis)
Furman forward Jalen Slawson (20) reacts after making a three-point shot against Virginia during the second half of a first-round college basketball game in the NCAA Tournament Thursday, March 16, 2023, in Orlando, Fla. Furman beat Virginia 68-67. AP Photo/Chris O'Meara)
On the men's tournament's opening day, only four out of 32 teams lost to lower-seeded foes but two of them were big: No. 2 seed Arizona and No. 4 seed Arizona both went down, busting millions of brackets.
Here are the complete results from Thursday's action, plus an updated bracket, today's schedule and a photo gallery from yesterday's games.
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