| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2003 | 
|---|---|---|---|---|---|
| 2 | 326 | Linus Kipchirchir Biwott |  KEN | ||
| 3 | 160 | Aitor MartÃn |  ESP | 48.17 | 48.17 | 
| 4 | 435 | Rafal Blocian |  POL | 47.86 | 47.86 | 
| 5 | 501 | Nagmeldin Ali Abubakr |  SUD | 46.32 | 46.32 | 
| 6 | 291 | Michael Gardener |  JAM | 49.59 | 49.59 | 
| 7 | 111 | Leiam Neale |  COK | ||
| 8 | 418 | Cameron Hayton |  NZL | 49.31 | 49.31 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2003 | 
|---|---|---|---|---|---|
| 2 | 139 | Antonio Side |  DOM | 48.06 | 48.06 | 
| 3 | 193 | Musa Jatta |  GAM | 48.19 | |
| 4 | 290 | Usain BOLT |  JAM | 45.35 | 45.35 | 
| 5 | 392 | Carlos Perez |  MEX | 49.41 | 49.41 | 
| 6 | 200 | Benjamin Higgins |  GBR | 48.04 | 48.04 | 
| 7 | 230 | Awudu Issah |  GHA | ||
| 8 | 524 | Yih-Sheng Chiou |  TPE | 49.52 | 49.52 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2003 | 
|---|---|---|---|---|---|
| 2 | 331 | Leonard Kibet Malakwen |  KEN | ||
| 3 | 279 | Karaka Appa Rao |  IND | 48.23 | 48.23 | 
| 4 | 100 | Yangyang Ming |  CHN | ||
| 5 | 571 | Cedric Goodman |  USA | 46.35 | 46.35 | 
| 6 | 429 | Nicolás López |  PAR | 49.86 | 49.86 | 
| 7 | 202 | Nick Leavey |  GBR | 47.83 | 47.83 | 
| 8 | 387 | Osbaldo Chavez |  MEX | 49.29 | 49.29 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2003 | 
|---|---|---|---|---|---|
| 2 | 48 | Josue Gomes Ramos |  BRA | 48.61 | 48.61 | 
| 3 | 72 | Ed Kalinowski |  CAN | 50.38 | 50.38 | 
| 4 | 496 | Ivano Bucci |  SMR | 52.16 | 52.16 | 
| 5 | 120 | Željko Vincek |  CRO | 47.30 | 47.30 | 
| 6 | 578 | Jarrith Jones |  USA | 48.21 | 48.85 | 
| 7 | 434 | Levi Albert |  PNG | ||
| 8 | 483 | Aleksandr Sigalovskiy |  RUS | 47.60 | 47.60 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2003 | 
|---|---|---|---|---|---|
| 2 | 407 | Frank Puriza |  NAM | 48.74 | 48.74 | 
| 3 | 141 | Francisco Aguirre |  ECU | 47.55 | 47.55 | 
| 4 | 359 | Ali Hussain |  KUW | 50.43 | 50.43 | 
| 5 | 12 | Joel Milburn |  AUS | 48.14 | 48.14 | 
| 6 | 457 | Christian Santiago |  PUR | 50.41 | 50.41 | 
| 7 | 421 | Samuel Wilson |  NZL | 48.69 | 48.69 | 
| 8 | 337 | Myung-jun Choi |  KOR | 47.49 | 47.49 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2003 | 
|---|---|---|---|---|---|
| 2 | 63 | Keenan Geer |  CAN | 50.13 | 50.13 | 
| 3 | 522 | Hsu-Chiao Huang |  TPE | 48.56 | 48.56 | 
| 4 | 381 | Mohammed Raziq |  MAR | ||
| 5 | 539 | Jamil James |  TTO | 46.68 | 46.68 | 
| 6 | 595 | José Acevedo |  VEN | 47.66 | 47.66 | 
| 7 | 45 | Mothusi Obeilwe |  BOT | 48.49 | |
| 8 | 453 | Carlos Benitez |  PUR | 49.24 | 49.24 |