Sha'Carri Richardson will not run the 200m at the Diamond League Final in Brussels on Saturday (14 September).
Last year's 100m world champion struggled in the 100m in chilly conditions on Friday, finishing a distant eighth behind Olympic gold medallist Julien Alfred.
The American star was due to contest the 200m, but her name was missing from the official online startlist at around 1400 local time with Dutch sprinter Tasa Jiya replacing her in the line-up.
Richardson made a sluggish start in the short sprint and failed to pick up, easing down across the line to clock 11.23. Alfred's winning time was 10.88.
Britain's Dina Asher-Smith was second ahead of Marie-Josee Ta Lou-Smith with the Ivorian veteran racing in the 200m which also features Paris 2024 bronze medallist Brittany Brown.
After winning an invitational 400m on Friday, Sydney McLaughln-Levrone will run in a similar 200m before the Diamond League track finals get underway.