IOWA CITY, Iowa — Lucy Olsen scored 28 points and Addison O’Grady had 13 as Iowa topped No. 4 USC 76-69 on Sunday, snapping the Trojans’ 15-game winning streak.

The win came on a day when Iowa retired Caitlin Clark’s jersey number 22 in a postgame ceremony, and the Hawkeyes delivered a win to add to the honor.

Iowa (15-7, 5-6 Big Ten) opened the game with an 18-1 run, fought off a 17-1 response by the Trojans in the second quarter, then matched USC the rest of the way.

The Trojans’ biggest lead was 47-41 in the third quarter, and they were up 50-45 with 2:09 left in the period before the Hawkeyes scored six consecutive points, capped by Olsen’s jumper right before the buzzer.

Olsen and O’Grady took control of the game in the second half. They had 23 of Iowa’s 25 fourth-quarter points to secure the win.

Sydney Affolter had 11 points and nine rebounds, and Hannah Stuelke added 10 points for the Hawkeyes.

JuJu Watkins led the Trojans (19-2, 9-1) with 27 points. Kiki Iriafen scored 13 points, and Kennedy Smith had 11.

The Trojans were staggered by Iowa’s early start, yet had a second-quarter response. Watkins got her points, but was 8 of 22 from the field, 1 of 7 in 3-pointers.

The Hawkeyes were at their best to start the game, feeding off the emotion of a sellout crowd of 14,998. With Clark in attendance, the game felt like some of her best moments over the last couple of the seasons.

USC had gotten to within 63-60 with five minutes to play, but O’Grady and Olsen answered with three consecutive field goals to put the Hawkeyes in command. Olsen later converted on a three-point play — O’Grady had the assist on her layup — and Iowa had a 72-62 lead.

USC missed 20 of its first 22 shots. Watkins had the Trojans’ lone field goal in the first quarter.

CLARK’S HONOR

Clark wasn’t back in her home arena to play a game.

Still, the “butterflies,” the former Iowa guard said, were quite similar.

Clark returned to Iowa’s Carver-Hawkeye Arena to have her number 22 retired, one season after she completed her historic college career.

“I feel like I already have those butterflies in your stomach when you walk in here,” Clark said during a pregame press conference. “Not so much for a basketball game now, but obviously just to be around everybody and to enjoy this environment. I don’t have to go and compete for 40 minutes, even though I wish maybe I could. I think it will definitely be a little bit more emotional that I don’t have to compete.”

Clark was at center court with her family as the No. 22 went up into the rafters. She was smiling throughout the ceremony.

The jersey retirement capped a historic career for Clark at Iowa. She became college basketball’s all-time leading scorer while leading the Hawkeyes to back-to-back appearances in the NCAA national championship game the last two seasons.

Former Iowa teammates Kate Martin and Gabbie Marshall were in courtside seats alongside former talk-show host David Letterman. USC’s coaches and players stayed on the court after the game to witness the ceremony.

“I’m sure it wasn’t cheap to get in,” Clark quipped during the ceremony.