PIX: US men, women storm to 4x400m World relay gold

Images from the World Athletics Championships in Eugene, Oregon, on Sunday, Day 10.

The United States maintained their stranglehold of the men's 4x400 metres relay on Sunday, winning the World Championships gold in dominant style.

The United States have now won eight of the past nine world titles and eight of the past 10 Olympic golds and Sunday's crown never looked in doubt.

Elija Godwin and Bryce Deadmon were retained from the semi-finals with newly-crowned individual gold medallist Michael Norman and Champion Allison, fourth in the final, drafted in and each man extended the lead as they came home in two minutes, 56.17 seconds.

In a race of their own 20 metres back, Jamaica took silver with Belgium collecting the bronze.

US women retain 4x400m relay title

The United States collected their third successive women's 4x400 metres relay World Championships title in dominant fashion on Sunday, finishing well clear of Jamaica and Britain in 3:17.79 seconds.

Talitha Diggs got the Americans off to a solid start and Abby Steiner kept ahead of Jamaican Janieve Russell in the second leg a day after helping the United States win gold in the sprint relay.

They maintained the lead through a series of clean changeovers before anchor Sydney McLaughlin, who shattered the 400m hurdles world record on Friday, brought it home for gold with a remarkable 47.91 final leg.

"I just wanted to give my team everything I had," said Diggs. "It felt amazing."

Jamaica, who took bronze in Doha, finished far behind the United States in 3:20.74, while Britain crossed the line in 3:22.64.

Allyson Felix, the most decorated woman in track, did not run in the final but earned a 20th World Championships medal after making a surprise return for the United States in the preliminary round.

Duplantis wins pole vault gold with World record

Sweden's Armand Duplantis broke his own pole vault World record with a jump of 6.21 metres on Sunday on the way to winning his first gold medal at the World Championships.

The Olympic champion cleared 6.00 metres to make sure of the title and then set a championships record of 6.06m, edging Dmitri Markov's mark of 6.05m set in Edmonton in 2001.

The 22-year-old then set his sights on his own record of 6.20m set at the World Indoor Championships in Belgrade earlier this year and improved upon it by 1cm with his second attempt.

"I was getting a bit tired towards the end so I really appreciate you guys," Duplantis said in an on-track interview at Hayward Field.

"This was awesome and I love being in Eugene."

American Chris Nilsen jumped 5.94m to take silver on countback ahead of the Philippines' Ernest John Obiena.

Stano edges Kawano by a second to win 35km race walk

Italy's Massimo Stano won the men's 35km race walk at the World Athletics Championships in dramatic fashion on Sunday, edging Japan's Masatora Kawano by one second.

Stano and Kawano battled shoulder-to-shoulder as the leading pair in the final 4km, but the Italian coped well with the pressure and accelerated in the final 300m to seal the gold medal.

Grabbing an Italian flag when he was on the final stretch, the 20km race walk Olympic champion finished in a time of 2:23:14, while Kawano sank to his knees in despair after crossing the line a second later.

"I can't believe even if I won the Olympic gold. In theory, it would be easy to understand what happened today, but it is not," Stano said.

"I am happy to win gold in a different distance and show that I can compete in other distances... Kawano did a great race. I had to change pace a few times to win today. He really tired me."

Stano's gold is Italy's second medal at this year's championships after Elena Vallortigara won bronze in the women's high jump on Tuesday.

Kawano, the fastest race walker coming into Sunday's event, had to settle for silver but the Japanese said he was happy, having suffered anaemia six months ago.

Sweden's Perseus Karlstrom took the bronze, mirroring his achievement from the 20km race walk last week, and he was all smiles as he crossed the line wearing a blue-and-yellow Viking helmet.

Earlier, Japan's Daisuke Matsunaga had looked well set for a medal when he led the race following an electric start but he ran out of gas after the 20km mark, eventually finishing 26th.

Mu holds off Hodgkinson to take 800m gold

American Olympic champion Athing Mu added the World 800 metres title to her resume on Sunday as the 20-year-old cleverly squeezed out Briton Keely Hodgkinson in a neck-and-neck finish.

Mu took up the running with 300m to go but Hodgkinson, also second behind her in the Tokyo Olympics, went with her and when the American drifted slightly wide coming into the home straight, the Briton, also 20, squeezed into the gap and looked set to go past.

Mu though, fairly and gradually, eased back across and kept her shoulder in front of her rival, shutting the door to take the tape in one minute, 56.30 seconds, with Hodgkinson second in 1:56.38.

Kenya's Mary Moraa won the battle for bronze in a personal best of 1:56.71 seconds.

Nigeria's Amusan wins 100 metres hurdles

Nigeria's Tobi Amusan won the 100 metres hurdles gold at the World Championships on Sunday in what was initially announced as a world record 12.06 seconds but later ruled ineligible as the wind speed exceeded the legal limit.

Amusan broke the World record earlier on Sunday by running 12.12 in the semi-final at Hayward Field.

She recovered from a slightly slower start to put on a pristine performance over the barriers, .17 seconds clear of silver medallist Britany Anderson of Jamaica.

"The goal was to come out and to win this gold," said Amusan.

"I believe in my abilities but I was not expecting a world record at these championships. You know, the goal is always just to execute well and get the win. So the world record is a bonus."

Puerto Rico's Olympic champion Camacho-Quinn accelerated at the midway mark but lost a close battle with Anderson over the final strides after hitting the last hurdle, going home with bronze in her first World Championships.

"I got my nerves to be honest. It kind of showed on my face but I am just glad to come out here," said Camacho-Quinn.

"From this point on, it is only going to be faster ... I think we had the best event of the whole world champs."

Anderson told reporters she was pleased with her performance, despite clipping some hurdles.

"I feel like everyone is so excited now," she said. "I came out here to do what I had to do and I did it."

The final was without 2019 champion Nia Ali and medal contender Alaysha Johnson, both of the United States, after they hit hurdles and crashed out in the opening round.

The United States' Olympic silver medallist Kendra Harrison, whose 2016 record Amusan broke in the semi-final, was disqualified.

Amusan’s world record in the semi-final stunned the athletics world.

“Wow” tweeted sprint king Usain Bolt, while 200m champion Noah Lyles tweeted: "Are you kidding me?"

Amusan said she was shocked to have produced the record in the semi-final but knew she had it in her.

"I could not believe it when I saw it on the screen after the semis. But it was just a matter of time," she told reporters.

Mihambo wins second straight World long jump title

Germany's Olympic champion Malaika Mihambo continued her dominance in the women's long jump by soaring to a second successive World Championships gold with a final leap of 7.12 metres.

World and Olympic bronze medallist Ese Brume of Nigeria claimed silver with 7.02m, while Brazil's Leticia Oro Melo took bronze with 6.89m.

Ingebrigtsen wins 5,000m with dominating run

Jakob Ingebrigtsen made up for his 1,500 metres disappointment by winning the World 5,000m title in emphatic style on Sunday, taking the lead with three laps to go and driving home at a pace that nobody could live with.

The Norwegian was beaten into second in the 1,500m by Briton Jake Wightman but avoided any risk of a similar last 200m burn-up by going clear after the early stages had been slow in very warm early evening conditions.

Ingebrigtsen came home in 13 minutes, 09.24 seconds ahead of Jacob Krop of Kenya, while Uganda's Oscar Chelimo found a home-straight burst to take bronze after American Grant Fisher had looked set for a medal until being tripped with 90m to go.

"It feels amazing. I felt really good today but at the same time, 5k is very, very tough," Ingebrigtsen said. "I won it and I needed it."