Women's 400m Final
vendredi 6 août 2021, 12h35 GMT – 17h35 GMT
| Nom | Temps | |
|---|---|---|
| 1 |  Shaunae Miller-Uibo | 48.36″ |
| 2 |  Marileidy Paulino | + 0.84″ |
| 3 |  Allyson Felix | + 1.1″ |
| 4 |  Stephenie Ann McPherson | + 1.25″ |
| 5 | Candice McLeod | + 1.51″ |
| 6 |  Jodie Williams | + 1.61″ |
| 7 | Quanera Hayes | + 2.52″ |