| Order / Lane | ATHLETE | COUNTRY | PB | SB 2011 |
|---|---|---|---|---|
| Shericka Williams |
JAM
|
49.32 | 50.45 | |
| Marta Milani |
ITA
|
51.86 | 51.86 | |
| Francena McCorory |
USA
|
50.06 | 50.24 | |
| Libania Grenot |
ITA
|
50.30 | 52.17 | |
| Amantle MONTSHO |
BOT
|
49.54 | 49.56 | |
| Perri Shakes-Drayton |
GBR
|
51.26 | 51.47 | |
| Allyson FELIX |
USA
|
49.59 | 49.59 | |
| Debbie Dunn |
USA
|
49.64 | 50.70 | |
| Sanya Richards-Ross |
USA
|
48.70 | 49.66 |