At the Diamond League competition in Zurich, Laura Muir of Great Britain won the women’s 800 meters, and Americans Sha’Carri Richardson and Noah Lyles won again.
Olympic 1500m silver medalist Muir ran her first competitive 800m race since last year’s Commonwealth Games, and she won in a dominating 1 minute 57.71 seconds.
The new 1500-meter world champion from Great Britain, Josh Kerr, came in second in a close race.
In the women’s 200-meter dash, Daryll Neita placed second, and Zharnel Hughes finished third.
Muir, who is 30 years old, competed in the 1500-meter final at the World Championships this past month in Budapest and placed sixth overall.
However, the Scot was a clear victor in Switzerland, finishing well to beat out Catriona Bisset of Australia (1:58.77) and Adelle Tracey of Jamaica (1:59.05).
With her time of 10.65 seconds in Budapest, Richardson, then 23 years old, announced herself to the world.
She was unable to repeat that performance in Switzerland, but she sprinted away in the final 30 meters to win in 10.88, beating out Natasha Morrison and Elaine Thompson-Herah of Jamaica, who both ran the race in 11.00.
Shericka Jackson of Jamaica, the reigning 200-meter world champion, won again in 21.82 seconds, with Neita of Great Britain coming in second and Kayla White of the United States of America coming in third.
Lyles, fresh off his sprint double in Budapest, won the men’s 200 meters in Zurich in 19.80 seconds to take first place, followed by teammate Erriyon Knighton in 19.87 and Britain’s world 100 meters bronze medalist, Hughes, in 19.94.
When Kerr was 25, he shocked Norwegian star Jakob Ingebrigtsen to win in Budapest. However, the Scotsman was denied a breakthrough victory this time.
Down the final stretch, he appeared to be able to hang on for the win, but American Yared Nuguse sneaked down the inside and lunged for the line, beating Kerr by a mere 0.2 seconds (3:30.49 to 3:30.50).
Norwegian world record holder Karsten Warholm suffered his first setback of the season at the hands of British Virgin Islands’ Kyron McMaster, who won the 400-meter hurdles in 47.27 seconds to just beat out the tired-looking world champion (47.30).