Eugene (USA): Fred Kerley led an American clean sweep in the 100 metres final on Saturday, the first since 1991, to send the home fans wild and give the sport's dominant nation a night to remember as they hosted the World Championships for the first time.
Kerley timed his dip perfectly to clock 9.86 seconds as Marvin Bracy took silver and Trayvon Bromell bronze, both with 9.88 seconds, but Bracy edged it by two-thousandths of a second.
A fourth American in the final, defending champion Christian Coleman, finished sixth.
Carl Lewis led clean sweeps in 1983 and 1991 but no nation has managed it since.
There was nothing between the medallists once they were into their running, and with Bromell out in lane eight and the other two side-by-side in three and four it was an impossible finish to call.
As each name, alongside the Stars and Stripes, appeared on the giant screen, the home crowd increased the volume of their cheers, greeting confirmation of the 1-2-3 with a chant of "USA".
That would have been more impressive had the 12,500-capacity stadium been anywhere near full on what should be the biggest night of the championships. The empty seats will be a huge disappointment for the organisers and World Athletics.
Kerley, of course, was not in the slightest bit worried about that. "I said we were going to do it and we did it - USA, baby," he said in a trackside interview.
Olympic silver medallist Kerley was the form runner in the field. He posted the year's leading time and a personal best of 9.76 on the same Eugene track when winning the U.S. trials last month, and his 9.79 on Friday was the fastest-ever world championships heat time.
He is one of only three men, along with South Africa's Wayde van Niekerk and fellow American Michael Norman, to have broken 10 seconds in the 100m, 20 seconds in the 200m and 44 seconds in the 400m.
And the 27-year-old is now the only man to have medalled at both 100m and 400m having finished third over one lap in 2019.
For Bromell, second-fastest in the world this year, the bronze was some sort of consolation after the Tokyo Olympics, where he failed to make the final after entering the Games as a favourite.
Jamaican Oblique Seville, the fastest of the semi-final qualifiers, finished fourth in 9.97, while Italy's Olympic champion Lamont Jacobs withdrew before the semi-finals due to injury.