| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Angelo Taylor |
USA
|
47.94 Q SB | 0.164 |
| 2 | Bershawn Jackson |
USA
|
48.02 Q SB | 0.164 |
| 3 | L.J. van Zyl |
RSA
|
48.57 Q | 0.251 |
| 4 | Marek Plawgo |
POL
|
48.75 Q | 0.318 |
| 5 | Isa Phillips |
JAM
|
48.85 | 0.294 |
| 6 | Aleksandr Derevyagin |
RUS
|
49.23 | 0.186 |
| 7 | Pieter de Villiers |
RSA
|
49.44 | 0.172 |
| 8 | Javier Culson |
PUR
|
49.85 | 0.248 |
| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Kerron Clement |
USA
|
48.27 Q | 0.316 |
| 2 | Danny McFarlane |
JAM
|
48.33 Q SB | 0.259 |
| 3 | Markino Buckley |
JAM
|
48.50 Q PB | 0.306 |
| 4 | PeriklÃs Iakovákis |
GRE
|
48.69 Q SB | 0.300 |
| 5 | Alwyn Myburgh |
RSA
|
49.16 | 0.361 |
| 6 | Jonathan Williams |
BIZ
|
49.64 | 0.166 |
| 7 | Mahau SUGUIMATI |
BRA
|
50.16 | 0.299 |
| 8 | Bayano Kamani |
PAN
|
50.48 | 0.221 |