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400 metres - Men (Heat A) World Record: 43.29 |
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| Rank | Athlete | Nat | Mark | |
| 1 | JOHNSON Michael | USA | 44.31 | |
| 2 | WASHINGTON Tyree | USA | 44.38 | |
| 3 | KAMOGA Davis | UGA | 44.43 | |
| 4 | BLACK Roger | GBR | 45.07 | |
| 5 | CLARKE Davian | JAM | 45.16 | |
| 6 | PETTIGREW Antonio | USA | 45.30 | |
| 7 | DIAGANA Stephane | FRA | 45.52 | |
| 8 | RUSTERHOLZ Matthias | SUI | 45.71 | |
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400 metres - Men (Heat B) World Record: 43.29 |
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| Rank | Athlete | Nat | Mark | |
| 1 | BALOSAK Stefan | SVK | 45.39 | |
| 2 | BADA Sunday | NGR | 45.42 | |
| 3 | HAUGHTON Greg | JAM | 45.72 | |
| 4 | JONES Chris | USA | 46.11 | |
| 5 | CLERC Laurent | SUI | 46.56 | |
| 6 | DOUGLAS Troy | BER | 47.30 | |
| 7 | ROHR Alain | SUI | 47.44 | |
| 8 | REIMANN Alain | SUI | 47.89 | |
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