Laufen 400m | 400m (F) | 04.08. 12:46 | 3. Halbfinale
| # | Name | Zeit | |
|---|---|---|---|
| 1 |  | Stephenie McPherson | 49.34s |
| 2 |  | Allyson Felix | 49.89s |
| 3 |  | Sada Williams | 50.11s |
| 4 |  | Natalia Kaczmarek | 50.79s |
| 5 |  | Kyra Constantine | 51.22s |
| 6 |  | Amandine Brossier | 51.30s |
| 7 |  | Cátia Azevedo | 51.32s |
| 8 |  | Lisanne de Witte | 52.09s |