| Order / Lane | ATHLETE | COUNTRY | PB | SB 2010 |
|---|---|---|---|---|
| Kseniya Aksyonova |
RUS
|
49.92 | 49.92 | |
| Amantle MONTSHO |
BOT
|
49.54 | 49.89 | |
| Shericka Williams |
JAM
|
49.32 | 50.04 | |
| Debbie Dunn |
USA
|
49.64 | 49.64 | |
| Tatyana Firova |
RUS
|
49.72 | 49.89 | |
| Libania Grenot |
ITA
|
50.30 | 50.43 | |
| Novlene Williams-Mills |
JAM
|
49.63 | 50.04 | |
| Allyson FELIX |
USA
|
49.59 | 50.15 |