| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 191 | Alleyne Francique |
GRN
|
45.86 Q | 0.169 |
| 2 | 36 | California Molefe |
BOT
|
46.02 Q | 0.259 |
| 3 | 482 | Milton Campbell |
USA
|
46.22 Q | 0.248 |
| 4 | 319 | Daniel Dabrowski |
POL
|
46.61 | 0.180 |
| 5 | 173 | Ruwen Faller |
GER
|
46.67 | 0.159 |
| 6 | 362 | Vladislav Frolov |
RUS
|
47.11 | 0.263 |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 20 | Chris Brown |
BAH
|
46.10 Q | 0.261 |
| 2 | 232 | Davian Clarke |
JAM
|
46.23 Q SB | 0.277 |
| 3 | 371 | Dmitriy Petrov |
RUS
|
46.44 Q | 0.151 |
| 4 | 322 | Marcin Marciniszyn |
POL
|
46.97 | 0.170 |
| 5 | 100 | Carlos Santa |
DOM
|
47.11 | 0.141 |
| 6 | 211 | David McCarthy |
IRL
|
47.11 | 0.171 |