Women's 400m Semi-Final 2
mercredi 4 août 2021, 10h38 GMT – 15h38 GMT
| Nom | Temps | |
|---|---|---|
| 1 |  Shaunae Miller-Uibo | 49.6″ |
| 2 |  Jodie Williams | + 0.37″ |
| 3 |  Roneisha McGregor | + 0.74″ |
| 4 |  Wadeline Jonathas | + 0.91″ |
| 5 |  Paola Moran | + 1.46″ |
| 6 |  Lieke Klaver | + 1.77″ |
| 7 | Aliyah Abrams | + 1.86″ |
| 8 |  Aauri Lorena Bokesa | + 1.97″ |