Home favourite Fred Kerley topped a podium of USA athletes with gold in the men's 100m final on day two of the World Athletics Championships in Eugene on Saturday.
The Olympic silver medallist - who set a new Championship record in his heat with 9.79 seconds - attacked with about 20m to go and just pipped compatriots Marvin Bracy and Trayvon Bromell to the gold medal with a time of 9.86.
Bracy and Bromell both crossed the line with 9.88 seconds on the clock, but the former would clinch the silver medal on reaction time as Bromell settled for third place.
Fellow USA athlete Christian Coleman stormed out of the blocks, but the 2019 world champion - returning after his suspension for missed drugs tests - ultimately faded away to finish sixth with a time of 10.01.
"It's a wonderful blessing to get a clean sweep. I feel we can dominate again at next year's World Championships (in Budapest)," Kerley told the press after winning the gold medal.
"We all put the work in, come back home and return again next year. This win means I can do 100 m, 200 m and 400 m. I got a medal in 400 m and 100 m. There's only one left. I approach the 200 m by getting rest today and tomorrow and get the job done Monday morning."
Elsewhere on day two, Tokyo 2020 silver medallist Laura Muir posted a season's best time of 4:01.78 to advance to the 1500m final, placing second in her semi-final behind Gudaf Tsegay (4:01.28),
However, Muir's British teammate Katie Snowden could only place 10th in her semi-final with a time of 4:08.29 and failed to make the final.
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The women's 100m heats would also take place before the men's final, where Great Britain's Dina Asher-Smith would lay down a marker with the fastest time of the day.
The 26-year-old - who won silver in the event at Doha in 2019 - crossed the line with 10.84 seconds on the clock to win her heat, but she has insisted that there is still more to come.
"Obviously I'm coming here as a reigning world champion and world silver medallist so clearly the aspirations are high for me," Asher-Smith told BBC Sport after the race.
"I knew that I'd been waiting all season to peak for this. I'm happy, I've got some more to give, but I was happy that I nailed the essential bits today. I honestly did not expect that time, but at the end of the day, we're looking to go faster so I'm excited."
Daryll Neita - who pipped Asher-Smith to the British 100m title back last month - also made it through to the semi-finals after clocking 10.95 seconds in her heat.
The women's 10,000 m final saw Eilish McColgan place 10th with a time of 30:34.60, as Jessica Judd (30:35.93) finished one place further back.
Nick Miller finished 11th in the men's hammer throw final with a distance of 73.74m, as Poland's Pawel Fajdek won his fifth World Championship title with 81.98m.
