Women's 400m Round 1 - Heat 2
samedi 13 août 2016, 14h07 GMT – 19h07 GMT
| Nom | Temps | |
|---|---|---|
| 1 |  Allyson Felix | 51.24″ |
| 2 |  Olha Zemlyak | + 0.16″ |
| 3 | Tamara Salaški | + 1.46″ |
| 4 | Tsholofelo Thipe | + 1.56″ |
| 5 | Iveta Putalová | + 1.58″ |
| 6 |  Aauri Lorena Bokesa | + 2.27″ |
| 7 | Seren Bundy-Davies | + 2.39″ |