Masai Russell, who runs for the University of Kentucky, broke the NCAA (USA collegiate) 100m hurdles record in Austin on Saturday.
After cruising through her heat in a wind-aided 12.61 on Friday, Russel returned to track on Saturday to win the final in a new personal best and NCAA record time of 12.36 (2.0m/s). The 20-year-old shaved 0.03 seconds off the collegiate record and moved to eighth on the US all-time list.
Alia Armstrong from Louisiana State University was second in 12.57, with her teammate Leah Phillips taking third in 12.95 seconds.
Elsewhere, Terrence Jones, the NCAA indoor 60m, set a huge personal best time in the 200m. The 20-year-old Bahamian, who competes for Texas Tech, beat Liberia's Emmanuel Matadi in a tight battle with a time of 20.05. Matadi, who won the 100m in a wind-aided 9.96 (2.9m/s) less than an hour earlier, finished second in 20.07. Courtney Lindsey from Texas Tech took third place with 20.11 seconds.
Olympic bronze medallist Gabby Thomas clocked 22.46 seconds to win the women's 200m.
Elsewhere on the track, Ewhile Morocco's Oussama El Bouchayby set a massive lifetime best of 1:45.31 to win the men's 800m.
In the field events, USA's Olympic champion Valarie Allman opened her 2023 discus throw campaign with a world-leading 67.90m. Her compatriot, JuVaughn Harrison, set a new World lead in the men's high jump with 2.33m.