| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 1481 | Michael Johnson |
USA
|
43.95 Q | 0.143 |
| 2 | 993 | Alejandro Manuel Cárdenas |
MEX
|
44.37 Q NR | 0.128 |
| 3 | 153 | Sanderlei Parrela |
BRA
|
44.37 Q AR | 0.186 |
| 4 | 533 | Mark Richardson |
GBR
|
44.47 Q SB | 0.210 |
| 5 | 1454 | Jerome Davis |
USA
|
44.51 PB | 0.143 |
| 6 | 1141 | Tomasz Czubak |
POL
|
44.62 NR | 0.184 |
| 7 | 862 | Kennedy Ochieng |
KEN
|
45.57 | 0.312 |
| 8 | 814 | Danny McFarlane |
JAM
|
45.86 | 0.246 |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 808 | Gregory Haughton |
JAM
|
45.09 Q | 0.155 |
| 2 | 516 | Jamie Baulch |
GBR
|
45.24 Q | 0.162 |
| 3 | 1293 | Matija Å estak |
SLO
|
45.47 | 0.144 |
| 4 | 1281 | Ibrahima Wade |
SEN
|
45.66 | 0.242 |
| 5 | 156 | Anderson Jorge dos Santos |
BRA
|
45.67 | 0.174 |
| 1498 | Antonio Pettigrew |
USA
|
DQ | 0.308 | |
| 1513 | Jerome Young |
USA
|
DQ | 0.163 | |
| 1160 | Piotr Rysiukiewicz |
POL
|
DNF | 0.224 |