| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Roger Black | 
                                         
                                        GBR
                                     | 
                                    45.81 Q | |
| 2 | Kennedy Ochieng | 
                                         
                                        KEN
                                     | 
                                    45.87 Q | |
| 3 | Arnaud Malherbe | 
                                         
                                        RSA
                                     | 
                                    46.09 Q | |
| 4 | Amar Hecini | 
                                         
                                        ALG
                                     | 
                                    46.29 Q | |
| 5 | Udeme Ekpeyong | 
                                         
                                        NGR
                                     | 
                                    46.41 | |
| 6 | Ahmed Ali | 
                                         
                                        GHA
                                     | 
                                    46.75 | |
| 7 | Kenmore Hughes | 
                                         
                                        ANT
                                     | 
                                    47.26 | |
| 8 | Medard Makanga | 
                                         
                                        CGO
                                     | 
                                    47.38 | 
| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Ibrahim Ismail Muftah | 
                                         
                                        QAT
                                     | 
                                    45.10 Q | |
| 2 | Davis Kamoga | 
                                         
                                        UGA
                                     | 
                                    45.34 Q | |
| 3 | Darnell Hall | 
                                         
                                        USA
                                     | 
                                    45.34 Q | |
| 4 | Bobang Phiri | 
                                         
                                        RSA
                                     | 
                                    45.94 Q | |
| 5 | Paul Greene | 
                                         
                                        AUS
                                     | 
                                    46.25 q | |
| 6 | Desiré Pierre-Louis | 
                                         
                                        MRI
                                     | 
                                    46.73 | |
| 7 | Evripides Demosthenous | 
                                         
                                        CYP
                                     | 
                                    46.84 | 
| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Mark Richardson | 
                                         
                                        GBR
                                     | 
                                    45.61 Q | |
| 2 | Gregory Haughton | 
                                         
                                        JAM
                                     | 
                                    45.62 Q | |
| 3 | Francis Ogola | 
                                         
                                        UGA
                                     | 
                                    45.70 Q | |
| 4 | Eswort Coombs | 
                                         
                                        VIN
                                     | 
                                    46.06 Q | |
| 5 | Hachim Ndiaye | 
                                         
                                        SEN
                                     | 
                                    46.31 q | |
| 6 | Maxime Charlemagne | 
                                         
                                        LCA
                                     | 
                                    48.21 | |
| Arnold Payne | 
                                         
                                        ZIM
                                     | 
                                    DQ | ||
| Sebastián Keitel | 
                                         
                                        CHI
                                     | 
                                    DNS | 
| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Michael Johnson | 
                                         
                                        USA
                                     | 
                                    45.49 Q | |
| 2 | Abednego Matilu | 
                                         
                                        KEN
                                     | 
                                    45.80 Q | |
| 3 | Davian Clarke | 
                                         
                                        JAM
                                     | 
                                    45.92 Q | |
| 4 | Adrian Patrick | 
                                         
                                        GBR
                                     | 
                                    46.11 Q | |
| 5 | Pablo Escribá | 
                                         
                                        ESP
                                     | 
                                    46.85 | |
| 6 | Omar Mena | 
                                         
                                        CUB
                                     | 
                                    47.53 | |
| Stephen Lugor | 
                                         
                                        SUD
                                     | 
                                    DQ | 
| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Harry Reynolds | 
                                         
                                        USA
                                     | 
                                    45.60 Q | |
| 2 | Mathias Rusterholz | 
                                         
                                        SUI
                                     | 
                                    45.97 Q | |
| 3 | Pierre-Marie Hilaire | 
                                         
                                        FRA
                                     | 
                                    46.13 Q | |
| 4 | Jude Monye | 
                                         
                                        NGR
                                     | 
                                    46.25 Q | |
| 5 | Jorge L. Crusellas | 
                                         
                                        CUB
                                     | 
                                    46.32 q | |
| 6 | Mohammed Al-Beshi | 
                                         
                                        KSA
                                     | 
                                    46.76 | |
| 7 | Richard Jones | 
                                         
                                        GUY
                                     | 
                                    47.36 | 
| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Samson Kitur | 
                                         
                                        KEN
                                     | 
                                    45.63 Q | |
| 2 | Norberto Téllez | 
                                         
                                        CUB
                                     | 
                                    45.72 Q | |
| 3 | Inaldo Justino Sena | 
                                         
                                        BRA
                                     | 
                                    45.75 Q | |
| 4 | Troy McIntosh | 
                                         
                                        BAH
                                     | 
                                    45.87 Q | |
| 5 | Michael Joubert | 
                                         
                                        AUS
                                     | 
                                    46.31 q | |
| 6 | Justice Dipeba | 
                                         
                                        BOT
                                     | 
                                    46.57 | |
| 7 | Raymundo Escalante | 
                                         
                                        MEX
                                     | 
                                    48.29 | 
| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Sunday Bada | 
                                         
                                        NGR
                                     | 
                                    46.08 Q | |
| 2 | Andrea Nuti | 
                                         
                                        ITA
                                     | 
                                    46.25 Q | |
| 3 | Danny McFarlane | 
                                         
                                        JAM
                                     | 
                                    46.27 Q | |
| 4 | Ju-il Shon | 
                                         
                                        KOR
                                     | 
                                    46.41 Q | |
| 5 | Sanderlei Parrela | 
                                         
                                        BRA
                                     | 
                                    46.59 | |
| 6 | Hayden Stephen | 
                                         
                                        TTO
                                     | 
                                    47.64 | |
| 7 | Solomone Bole | 
                                         
                                        FIJ
                                     | 
                                    47.92 | |
| Álvaro James | 
                                         
                                        CRC
                                     | 
                                    DQ |