The American Sydney McLaughlin has again improved her world record in the 400 meter hurdles.

The 22-year-old track and field athlete won the US Championships in Eugene on Saturday (local time) in 51.41 seconds.

The Olympic champion thus undercut her own record from the Tokyo games last year.

Back then, McLaughlin had won the gold medal in 51.46 seconds.

With three weeks to go before the World Championships in Eugene, McLaughlin is still hoping for a further improvement.

"I think there's a little bit more in the tank and we can empty it completely when the time comes," said McLaughlin, who announced to celebrate the day, "I'm going to eat something real besides veggies.

A cheeseburger or something, a couple of pancakes.” Britton Wilson (53.08) and Shamier Little (53.92) finished second and third on Saturday, some way behind.

World champion Dalilah Muhammad did not compete because she was slightly injured, but as the defending champion she is automatically qualified for the World Championships from July 15th to 24th.

Old champion Allyson Felix was sixth over 400 meters in 51.24 seconds and thus kept the chance of a World Championship participation in one of the relays.

It would be the tenth world championships for the 36-year-old, who has already won 13 world titles and will end her great career.

Winner Talitha Diggs ran 50.22 seconds, in the men's Michael Norman won the world title over the stadium circuit with a world best time of 43.56 seconds.

Olympic silver medalist Fred Kerley won the 100 meters and became the favorite of the World Athletics Championships.

In the final, the 27-year-old beat Marvin Bracy Williams and Trayvon Bromell in 9.77 seconds.

He was only a hundredth above his time from the semifinals.

Still, Kerley wasn't entirely satisfied.

He "expected something faster," he said.

As the third-fastest American to date, the Tokyo silver medalist does not see his goal yet: "Whenever I can get Usain Bolt's world record - that's what I aim for." to the final.

Melissa Jefferson replaces Sha'Carri Richardson

In the women's race, Melissa Jefferson surprisingly won in 10.69 seconds - albeit with too much tailwind - ahead of Aleia Hobbs and Twanisha Terry.

"I thought: Wow, did that really happen?" said the 21-year-old, who qualified for a World Cup for the first time.

Sprint star Sha'Carri Richardson had already been eliminated in the preliminary heat and thus missed out on the World Cup ticket.

Two-time Olympic champion and world record holder Ryan Crouser improved his own world record for the year by winning the shot put with 23.12 meters.

Number one in the world is also the two-time world indoor champion Sandi Morris, who rose to 4.81 meters in the pole vault.