| Final | time | L | | 1. Michael Johnson |  USA | 43.49s | 4 | | 2. Roger Black |  GBR | 44.41s | 3 | | 3. Davis Kamoga |  UGA | 44.53s | 2 | | 4. Alvin Harrison | USA | 44.62s | 1 | | 5. Iwan Thomas | GBR | 44.70s | 8 | | 6. Roxbert Martin |  JAM | 44.83s | 5 | | 7. Davian Clarke | JAM | 44.99s | 6 | | -. Ibrahim Ismail |  QAT | DNF | 7 |
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| Semi 1 | time | L | | 1. Roger Black | GBR | 44.69s | 4 | | 2. Davian Clarke | JAM | 44.87s | 3 | | 3. Ibrahim Ismail | QAT | 45.02s | 6 | | 4. Alvin Harrison | USA | 45.04s | 5 | | 5. Samson Kitur |  KEN | 45.17s | 2 | | 6. Stefan Balosak |  SVK | 45.59s | 7 | | 7. Troy Douglas |  BER | 46.33s | 8 | | -. Butch Reynolds | USA | DNF | 1 |
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| Semi 2 | time | L | | 1. Michael Johnson | USA | 44.59s | 5 | | 2. Roxbert Martin | JAM | 44.81s | 6 | | 3. Davis Kamoga | UGA | 44.85s | 1 | | 4. Iwan Thomas | GBR | 45.01s | 3 | | 5. Sunday Bada |  NGR | 45.30s | 4 | | 6. Eswort Coombs |  VIN | 45.36s | 8 | | 7. Michael Mcdonald | JAM | 45.48s | 2 | | 8. Neil de Silva |  TRI | 45.56s | 7 |
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| Quarter 1 | time | L | | 1. Sunday Bada | NGR | 44.88s | 3 | | 2. Davian Clarke | JAM | 44.98s | 4 | | 3. Samson Kitur | KEN | 45.03s | 6 | | 4. Troy Douglas | BER | 45.26s | 2 | | 5. Arnaud Malherbe |  RSA | 45.26s | 5 | | 6. Tawanda Chiwira |  ZIM | 45.38s | 7 | | 7. Mathias Rusterholz |  SUI | 45.72s | 8 | | 8. Piotr Rysiukiewicz |  POL | 46.19s | 1 |
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| Quarter 2 | time | L | | 1. Roger Black | GBR | 44.72s | 3 | | 2. Ibrahim Ismail | QAT | 44.96s | 4 | | 3. Butch Reynolds | USA | 45.21s | 5 | | 4. Stefan Balosak | SVK | 45.32s | 8 | | 5. Alejandro Cardenas |  MEX | 45.33s | 7 | | 6. Bobang Phiri | RSA | 45.51s | 1 | | 7. Sanderlei Parrela |  BRA | 45.72s | 6 | | 8. Kennedy Ochieng | KEN | 45.72s | 2 |
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| Quarter 3 | time | L | | 1. Michael Johnson | USA | 44.62s | 6 | | 2. Roxbert Martin | JAM | 44.74s | 7 | | 3. Davis Kamoga | UGA | 44.82s | 8 | | 4. Neil de Silva | TRI | 45.02s | 4 | | 5. Clement Chukwu | NGR | 45.24s | 3 | | 6. Du'aine Ladejo | GBR | 45.62s | 2 | | 7. Sugath Thilakaratne |  SRI | 45.78s | 5 | | 8. Paul Greene |  AUS | 46.22s | 1 |
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| Quarter 4 | time | L | | 1. Alvin Harrison | USA | 44.79s | 4 | | 2. Iwan Thomas | GBR | 45.04s | 6 | | 3. Michael Mcdonald | JAM | 45.26s | 7 | | 4. Eswort Coombs | VIN | 45.43s | 5 | | 5. Jean-Louis Rapnouil |  FRA | 45.74s | 3 | | 6. Hendrik Mokganyetsi | RSA | 46.48s | 1 | | -. Jude Monye | NGR | DNF | 2 | | -. Charles Gitonga | KEN | DNS | 8 |
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| Heat 1 | time | L | | 1. Roger Black | GBR | 45.28s | 3 | | 2. Neil de Silva | TRI | 45.34s | 2 | | 3. Stefan Balosak | SVK | 45.86s | 1 | | 4. Jude Monye | NGR | 46.10s | 6 | | 5. Michael Joubert | AUS | 46.30s | 7 | | 6. Kossi Akoto |  TOG | 46.94s | 5 | | -. Mustafa Abdelnaser |  LBA | DQ | 8 | | -. Amar Hecini |  ALG | DQ | 4 |
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| Heat 2 | time | L | | 1. Davian Clarke | JAM | 45.54s | 5 | | 2. Sanderlei Parrela | BRA | 45.60s | 7 | | 3. Troy Douglas | BER | 45.61s | 1 | | 4. Charles Gitonga | KEN | 45.62s | 6 | | 5. Piotr Rysiukiewicz | POL | 46.07s | 2 | | 6. Mohammed al-Beshi |  KSA | 46.82s | 3 | | 7. Ivan Jean-Marie |  LCA | 47.13s | 8 | | 8. Hassani Abdou |  COM | 50.17s | 4 |
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| Heat 3 | time | L | | 1. Alvin Harrison | USA | 44.69s | 6 | | 2. Ibrahim Ismail | QAT | 45.61s | 5 | | 3. Paul Greene | AUS | 46.12s | 2 | | 4. Shigekazu Omori |  JPN | 46.30s | 8 | | 5. Laurent Clerc | SUI | 46.42s | 3 | | 6. Ju-ll Shon |  KOR | 46.74s | 4 | | 7. Subul Babo |  PNG | 48.15s | 7 | | -. Justice Dipeba |  BOT | DNS | 1 |
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| Heat 4 | time | L | | 1. Eswort Coombs | VIN | 45.84s | 6 | | 2. Jean-Louis Rapnouil | FRA | 45.93s | 5 | | 3. Du'aine Ladejo | GBR | 46.27s | 3 | | 4. Troy Mclntosh |  BAH | 46.42s | 2 | | 5. Valdinei da Silva | BRA | 46.61s | 7 | | 6. Richard Jones |  GUY | 46.69s | 1 | | 7. Mpho Morobe |  LES | 47.54s | 4 | | 8. Mohamed Amir |  MDV | 49.67s | 8 |
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| Heat 5 | time | L | | 1. Sugath Thilakaratne | SRI | 45.79s | 8 | | 2. Michael Johnson | USA | 45.80s | 3 | | 3. Alejandro Cardenas | MEX | 45.85s | 6 | | 4. Bobang Phiri | RSA | 45.94s | 1 | | 5. Kennedy Ochieng | KEN | 45.99s | 5 | | 6. Evripides Demosthenous |  CYP | 46.76s | 2 | | 7. Emmanuel Rubayiza |  RWA | 49.20s | 4 | | -. Francis Ogola | UGA | DNF | 7 |
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| Heat 6 | time | L | | 1. Butch Reynolds | USA | 45.42s | 7 | | 2. Arnaud Malherbe | RSA | 45.75s | 3 | | 3. Tawanda Chiwira | ZIM | 45.89s | 6 | | 4. Mathias Rusterholz | SUI | 45.92s | 5 | | 5. Dawda Jallow |  GAM | 46.73s | 1 | | 6. Eugene Farrell |  IRL | 47.18s | 4 | | 7. Casimiro Nze |  GEQ | 50.14s | 2 | | 8. Ibrahim Hassan |  GHA | DNF | 8 |
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| Heat 7 | time | L | | 1. Clement Chukwu | NGR | 45.18s | 1 | | 2. Samson Kitur | KEN | 45.39s | 8 | | 3. Michael Mcdonald | JAM | 45.50s | 5 | | 4. Hendrik Mokganyetsi | RSA | 45.89s | 6 | | 5. Osmar dos Santos | BRA | 46.16s | 4 | | 6. Robert Guy | TRI | 46.80s | 2 | | 7. Martial Biguet |  CAF | 48.92s | 7 | | 8. Anwar Ali |  YEM | 50.81s | 3 |
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| Heat 8 | time | L | | 1. Sunday Bada | NGR | 45.19s | 2 | | 2. Iwan Thomas | GBR | 45.22s | 7 | | 3. Davis Kamoga | UGA | 45.56s | 1 | | 4. Roxbert Martin | JAM | 46.01s | 5 | | 5. Mark Ladbrook | AUS | 46.28s | 8 | | 6. Carl Oliver | BAH | 47.41s | 6 | | 7. Kimitene Biyago |  CHA | 48.88s | 3 | | -. Ibrahim Ouedraogo |  BUR | DNS | 4 |
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