Sha'Carri Richardson applauds Jamaica's 100m clean sweep

"Congratulations to the ladies of Jamaica for the clean sweep," Richardson, who had been a Tokyo medal contender before the ban, wrote on Twitter. "Powerful, strong black women dominating the sport."

The 21-year-old Richardson streaked to victory in the 100m at the U.S. Olympic trials in June, and was expected to be one of the top stars at the Games in Japan.

She represented the best U.S. chance of a first gold since Gail Devers won in 1996, and after Marion Jones was stripped of the 2000 title for doping offences.

But things unraveled for her after she won the U.S. trials with an impressive 10.86 and tested positive for cannabis and was banned for a month, which ruled her out of the tournament.

Richardson said she was dealing with the death of her mother at the time and the United States Anti-Doping Agency (USADA) said that her ban was reduced to one month because she had used cannabis out of competition and it was unrelated to sport performance.

On Saturday in Tokyo, the lone American competing in the final Teahna Daniels finished seventh with a time of 11.02.

It was one of the fastest finals on record with six sprinters out of the eight finalists running under 11 seconds.

Silver medalist Fraser-Pryce, who said Tokyo 2020 would be her last Olympics, said the performances on the track showed how high the level of female sprinting has reached.

"I'm really excited that female sprinting is going (to) another level and that's truly remarkable," she said after the race. "It speaks to the depth that we have in terms of females."

Richardson could be part of that future of the sport.