| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Danny Harris |
USA
|
48.21 Q | |
| 2 | Winthrop Graham |
JAM
|
48.31 Q | |
| 3 | Derrick Adkins |
USA
|
49.37 Q | |
| 4 | Niklas Wallenlind |
SWE
|
49.81 Q | |
| 5 | Eronilde Nunes de Araújo |
BRA
|
49.91 | |
| 6 | Shunji Karube |
JPN
|
49.94 | |
| 7 | Gideon Yego |
KEN
|
50.07 | |
| 8 | Fabrizio Mori |
ITA
|
50.70 |
| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Kriss Akabusi |
GBR
|
47.91 | |
| 2 | Samuel Matete |
ZAM
|
48.30 Q | |
| 3 | Kevin Young |
USA
|
48.39 Q | |
| 4 | Erick Keter |
KEN
|
48.47 Q | |
| 5 | Vladimir Budko |
URS
|
49.53 | |
| 6 | Sven Nylander |
SWE
|
49.59 | |
| 7 | Domingo Cordero |
PUR
|
49.86 | |
| 8 | Pedro Chiamulera |
BRA
|
50.02 |