Jamaica’s trio of Olympic 100m medalists stamped their class on a first rate field in Oregon to put no doubt on the results in Tokyo last month.

At the same time, Olympic champion Elaine Thompson-Herah demolished her national record set in Tokyo while upstart American Sha’Carri Richardson could only manage last place in her return to the track.

Thompson-Herah blazed to a 10.54 finish as Jamaicans Shelly-Ann Fraser- Pryce and Shericka Jackson repeated their second and third place finishes from the Olympics with times of 10:73 and 10:76, respectively.

Richardson’s hopes went up in a puff of smoke as she had intended to prove herself after missing out on the Olympics due to a drug ban.

Richardson was widely seen as an Olympic favourite ahead of the Tokyo Games, winning the 100m final at the U.S. track and field Olympic trials in Eugene in June.

On July 1, it was reported that Richardson had failed a drug test at the trials, testing positive for marijuana.

The drug is legal for recreational use in Oregon, where she was when she used it.