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Sha'Carri Richardson marked a time of 10.94 seconds in her Olympic debut to qualify for the women's 100-meter semifinals on Friday.
The reigning world champion posted the third-fastest time of the day in Friday's preliminary heat.
Richardson pulled ahead about a third of the way through the race and held her lead all the way to the finish line to claim the win.
Next up is the semifinal, where Richardson could win the chance to be one of the eight women racing for gold in the 100m final on Saturday.