The treble is still on for the Dutch athlete after she picks herself up from the track following a trip to qualify for next round, while there is drama in the women's 200m heats too
Shelly-Ann Fraser-Pryce, Shaunae Miller-Uibo, Allyson Felix, Kendra Harrison and Sydney McLaughlin are among the big names contesting the shortest women's track events
Namibian 18-year-old runs 48.54 for 400m but must now focus on 200m in Tokyo due to her naturally-high testosterone levels that are above World Athletics' limits
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