![Tokyo Olympics: Highlights of the women's 400m semi-finals featuring Allyson Felix and Jodie Williams](https://cdn.newsserve.net/en/knowledge/-Summer-Olympics_20190122.jpg)
Tokyo Olympics: Highlights of the women's 400m semi-finals featuring Allyson Felix and Jodie Williams
Watch highlights of the women's 400m semi-finals featuring Allyson Felix and Jodie Williams, who clocks a personal best of 49.97 seconds to progress to the final.
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