Sydney McLaughlin ran the 400 meter hurdles to Olympic gold in a world record time.
The 21-year-old American improved the record she set herself to 51.46 seconds three days before her birthday.
In the final sprint on Wednesday in Tokyo, McLaughlin relegated her compatriot and 2016 Olympic champion, Dalilah Muhammad, to second place.
In 51.58 seconds, Muhammad also stayed below the old record of 51.90 seconds set by McLaughlin at the US Trials in June.
Bronze went to Femke Bol from the Netherlands (52.03).
For the German champion Carolina Krafzik, the semifinals were the final destination. In 54.95 seconds, the woman from Sindelfingen was fourth in her run on Monday.