Olympic champion Sydney McLaughlin broke her own world record in the 400-meter hurdles as the U.S. outdoor track and field championships on Saturday.

Olympic gold medalist Elaine Thompson-Herah of Jamaica held off American Sha’Carri Richardson in the 100 meters at a rainy Prefontaine Classic on Saturday.

A five-minute burst of action near the backstretch of the Olympic track served up the perfect snapshot of what is going right and all that is going wrong for the U.S. track and field team in Tokyo.

The reigning world champion kept his patience after a blistering start from American Michael Norman – who ultimately placed fifth – and surged through the homestretch to finish in 43.85.

The action on Day 13 of the Tokyo Games will feature track and field, with medals in the men’s 400-meter final, the men’s and women’s 4x100 relays and the women’s 400 meters.

Defending champion and world-record holder Wayde van Niekerk of South Africa crashed out, finishing fifth in the third semifinal.

World relay gold medalist Cherry, who finished second at U.S. Olympic Trials in June, won his heat easily in 44.82.

Athletes spend months, sometimes years, obeying strict diets that are geared toward the goal of making the Olympics.