| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 895 | LaShawn Merritt | 
                                         
                                        USA
                                     | 
                                    45.84 Q | 0.157 | 
| 2 | 761 | Nagmeldin Ali Abubakr | 
                                         
                                        SUD
                                     | 
                                    45.99 Q | 0.173 | 
| 3 | 611 | Andrés RodrÃguez | 
                                         
                                        PAN
                                     | 
                                    47.42 | 0.173 | 
| 4 | 431 | Michael Gardener | 
                                         
                                        JAM
                                     | 
                                    47.49 | 0.157 | 
| 5 | 758 | Manoj Pushpa Kumara | 
                                         
                                        SRI
                                     | 
                                    47.65 | 0.161 | 
| 6 | 54 | Andretti Bain | 
                                         
                                        BAH
                                     | 
                                    47.86 | 0.178 | 
| 7 | 683 | Ruaan Grobler | 
                                         
                                        RSA
                                     | 
                                    49.26 | 0.143 | 
| 820 | Renny QUOW | 
                                         
                                        TTO
                                     | 
                                    DQ | 0.243 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 91 | Obakeng Ngwigwa | 
                                         
                                        BOT
                                     | 
                                    46.64 Q NJR | 0.166 | 
| 2 | 30 | Sean Wroe | 
                                         
                                        AUS
                                     | 
                                    46.80 Q PB | 0.240 | 
| 3 | 880 | Keith Hinnant | 
                                         
                                        USA
                                     | 
                                    46.93 q | 0.185 | 
| 4 | 274 | Richard Buck | 
                                         
                                        GBR
                                     | 
                                    47.18 | 0.166 | 
| 5 | 455 | Kazunori Ota | 
                                         
                                        JPN
                                     | 
                                    47.40 | 0.145 | 
| 6 | 631 | Damian Kempa | 
                                         
                                        POL
                                     | 
                                    47.62 | 0.182 | 
| 7 | 414 | Claudio Licciardello | 
                                         
                                        ITA
                                     | 
                                    48.19 | 0.171 | 
| 8 | 454 | Yudai Sasaki | 
                                         
                                        JPN
                                     | 
                                    48.27 | 0.180 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 712 | Valentin Kruglyakov | 
                                         
                                        RUS
                                     | 
                                    46.46 Q | 0.171 | 
| 2 | 831 | Serdar Tamac | 
                                         
                                        TUR
                                     | 
                                    46.94 Q NJR | 0.143 | 
| 3 | 94 | Paulo Roberto Orlando | 
                                         
                                        BRA
                                     | 
                                    47.02 q | 0.155 | 
| 4 | 163 | Željko Vincek | 
                                         
                                        CRO
                                     | 
                                    47.08 | 0.237 | 
| 5 | 593 | Cory Innes | 
                                         
                                        NZL
                                     | 
                                    47.37 | 0.179 | 
| 6 | 698 | Maksim Aleksandrenko | 
                                         
                                        RUS
                                     | 
                                    47.79 | 0.103 | 
| 7 | 31 | Ben Offereins | 
                                         
                                        AUS
                                     | 
                                    48.25 | 0.169 | 
| 185 | Roger Polydore | 
                                         
                                        DMA
                                     | 
                                    DNF | 0.168 |