| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2011 | 
|---|---|---|---|---|---|
| 1 | 954 | Emir Bekric |  SRB | 49.55 | 49.55 | 
| 2 | 441 | David GREENE |  GBR | 47.88 | 48.20 | 
| 3 | 277 | Omar Cisneros |  CUB | 48.21 | 49.26 | 
| 4 | 479 | Georg Fleischhauer |  GER | 49.50 | 49.50 | 
| 5 | 882 | Cornel Fredericks |  RSA | 48.14 | 48.14 | 
| 6 | 203 | Mahau SUGUIMATI |  BRA | 48.67 | 49.17 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2011 | 
|---|---|---|---|---|---|
| 1 | 868 | Jamele Mason |  PUR | 49.30 | 49.30 | 
| 2 | 657 | Vincent Kiplangat Kosgei |  KEN | 49.36 | 50.09 | 
| 3 | 599 | Isa Phillips |  JAM | 48.05 | 48.94 | 
| 4 | 306 | Felix Sánchez |  DOM | 47.25 | 49.41 | 
| 5 | 1070 | Kerron Clement |  USA | 47.24 | 48.74 | 
| 6 | 900 | L.J. van Zyl |  RSA | 47.66 | 47.66 | 
| 7 | 859 | Jorge Paula |  POR | 49.72 | 49.72 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2011 | 
|---|---|---|---|---|---|
| 1 | 906 | Aleksandr Derevyagin |  RUS | 49.00 | 49.48 | 
| 2 | 1126 | Angelo Taylor |  USA | 47.25 | 47.94 | 
| 3 | 865 | Javier Culson |  PUR | 47.72 | 48.33 | 
| 4 | 692 | Seung-yoon Lee |  KOR | 50.72 | 51.05 | 
| 5 | 621 | Takayuki KISHIMOTO |  JPN | 49.27 | 49.27 | 
| 6 | 243 | Zhilong Li |  CHN | 49.58 | 49.58 | 
| 7 | 1058 | Andrés Silva |  URU | 49.16 | 49.16 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2011 | 
|---|---|---|---|---|---|
| 1 | 182 | Kenneth Medwood |  BIZ | 49.66 | 50.38 | 
| 2 | 1010 | Jehue Gordon |  TTO | 48.26 | 48.75 | 
| 3 | 610 | Takatoshi ABE |  JPN | 49.46 | 49.64 | 
| 4 | 440 | Jack Green |  GBR | 48.98 | 48.98 | 
| 5 | 1087 | Bershawn Jackson |  USA | 47.30 | 47.93 | 
| 6 | 603 | Josef Robertson |  JAM | 49.22 | 49.37 | 
| 7 | 236 | Wen Cheng |  CHN | 49.28 | 49.28 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2011 | 
|---|---|---|---|---|---|
| 1 | 1059 | Jeshua Anderson |  USA | 47.93 | 47.93 | 
| 2 | 773 | Kurt Couto |  MOZ | 49.12 | 49.43 | 
| 3 | 774 | Jean Antonio Vieillesse |  MRI | 50.25 | 50.82 | 
| 4 | 616 | Yuta Imazeki |  JPN | 49.27 | 49.27 | 
| 5 | 1051 | Stanislav Melnykov |  UKR | 49.09 | 49.62 | 
| 6 | 595 | Leford Green |  JAM | 48.47 | 49.03 | 
| 7 | 465 | Nathan Woodward |  GBR | 48.71 | 48.71 |