Noah Lyles won the men's 100m Olympic title on Sunday night. The 27-year-old American beat Kishane Thompson from Jamaica by five-thousandths of a second. Fred Kerley from the United States was third.
The sprinters were left looking up at the official scoreboard after the dash for around 15 seconds as judges tried to decrypt the mass of bodies on the finishing line.
Lyles was deemed the victor in a personal best time of 9.784. Thompson was clocked at 9.789 seconds.
The victory - his first Olympic gold - comes a year after he won the 100m world championship title in Budapest last year.
He will compete in the 200m as he attempts to become the first man since Usain Bolt in 2016 to win the sprint double at an Olympic Games.
Akani Simbine, who finished fourth and Letsile Tebogo from Botswana who finished sixth set new records for South Africa and Botswana with times of 9.82 and 9.86 seconds respectively.
In the athletics field events at the Stade de France, world champion Ethan Katzberg from Canada won the men's hammer throw and Yaroslava Mahuchikh took the women's high jump with a leap of 2.02 metres.
