| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Michael Johnson |
USA
|
44.91 Q | |
| 2 | Sunday Bada |
NGR
|
45.03 Q | |
| 3 | Darnell Hall |
USA
|
45.07 Q | |
| 4 | Roger Black |
GBR
|
45.32 Q | |
| 5 | Abednego Matilu |
KEN
|
45.41 | |
| 6 | Davian Clarke |
JAM
|
45.58 | |
| 7 | Mathias Rusterholz |
SUI
|
45.80 | |
| 8 | Davis Kamoga |
UGA
|
45.92 |
| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Gregory Haughton |
JAM
|
44.70 Q | |
| 2 | Harry Reynolds |
USA
|
45.10 Q | |
| 3 | Samson Kitur |
KEN
|
45.27 Q | |
| 4 | Mark Richardson |
GBR
|
45.42 Q | |
| 5 | Jude Monye |
NGR
|
45.95 | |
| 6 | Danny McFarlane |
JAM
|
45.98 | |
| 7 | Norberto Téllez |
CUB
|
46.68 | |
| Ibrahim Ismail Muftah |
QAT
|
DNS |