| Order / Lane | ATHLETE | COUNTRY | PB | SB 2011 |
|---|---|---|---|---|
| Shericka Williams |
JAM
|
49.32 | 50.45 | |
| Debbie Dunn |
USA
|
49.64 | 50.70 | |
| Antonina Yefremova |
UKR
|
50.69 | 50.69 | |
| Kaliese Spencer |
JAM
|
50.55 | 50.71 | |
| Novlene Williams-Mills |
JAM
|
49.63 | 50.05 | |
| Amantle MONTSHO |
BOT
|
49.54 | 49.56 | |
| Sanya Richards-Ross |
USA
|
48.70 | 49.66 | |
| Natasha Hastings |
USA
|
49.84 | 50.97 |