| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Alvin Harrison | 
                                         
                                        USA
                                     | 
                                    44.53 Q | |
| 2 | Michael Johnson | 
                                         
                                        USA
                                     | 
                                    44.65 Q | |
| 3 | Gregory Haughton | 
                                         
                                        JAM
                                     | 
                                    44.93 Q | |
| 4 | Sanderlei Parrela | 
                                         
                                        BRA
                                     | 
                                    45.17 Q | |
| 5 | Avard Moncur | 
                                         
                                        BAH
                                     | 
                                    45.18 | |
| 6 | Piotr Haczek | 
                                         
                                        POL
                                     | 
                                    45.66 | |
| 7 | Patrick Dwyer | 
                                         
                                        AUS
                                     | 
                                    45.70 | |
| 8 | Hamdan Odha Al-Bishi | 
                                         
                                        KSA
                                     | 
                                    45.98 | 
| POS | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|
| 1 | Danny McFarlane | 
                                         
                                        JAM
                                     | 
                                    45.38 Q | |
| 2 | Hendrick Mokganyetsi | 
                                         
                                        RSA
                                     | 
                                    45.52 Q | |
| 3 | Robert Mackowiak | 
                                         
                                        POL
                                     | 
                                    45.53 Q | |
| 4 | Daniel Caines | 
                                         
                                        GBR
                                     | 
                                    45.55 | |
| 5 | Casey Vincent | 
                                         
                                        AUS
                                     | 
                                    45.61 | |
| 6 | Alessandro Attene | 
                                         
                                        ITA
                                     | 
                                    46.41 | |
| Antonio Pettigrew | 
                                         
                                        USA
                                     | 
                                    DQ | ||
| Davian Clarke | 
                                         
                                        JAM
                                     | 
                                    DNF |