| Final 20:40 | time | | L | | 1. Michael Johnson |  USA | 44.12s | | 4 | | 2. Davis Kamoga |  UGA | 44.37s | | 7 | | 3. Tyree Washington | USA | 44.39s | | 3 | | 4. Mark Richardson |  GBR | 44.47s | | 5 | | 5. Jerome Young | USA | 44.51s | | 6 | | 6. Iwan Thomas | GBR | 44.52s | | 2 | | 7. Jamie Baulch | GBR | 45.22s | | 1 | | -. Antonio Pettigrew | USA | 44.57s | DQ | 8 |
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| Heat 1 19.35h | | time | L | | 1. Tyree Washington | USA | 44.61s | 4 | | 2. Mark Richardson | GBR | 44.62s | 3 | | 3. Jamie Baulch | GBR | 44.69s | 6 | | 4. Antonio Pettigrew | USA | 44.87s | 5 | | 5. Davian Clarke |  JAM | 45.07s | 2 | | 6. Ibrahima Wade |  SEN | 45.47s | 7 | | 7. Sunday Bada |  NGR | 45.96s | 1 | | -. Robert Mackowiak |  POL | DNS | 8 |
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| Heat 2 19.45h | | time | L | | 1. Michael Johnson | USA | 44.37s | 2 | | 2. Jerome Young | USA | 44.50s | 4 | | 3. Davis Kamoga | UGA | 44.57s | 3 | | 4. Iwan Thomas | GBR | 44.61s | 6 | | 5. Clement Chukwu | NGR | 45.26s | 5 | | 6. Roxbert Martin | JAM | 45.49s | 7 | | 7. Tomasz Czubak | POL | 45.51s | 8 | | 8. Michael McDonald | JAM | 45.74s | 1 |
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| Heat 1 18.00h | | time | L | | 1. Antonio Pettigrew | USA | 44.88s | 3 | | 2. Iwan Thomas | GBR | 44.98s | 4 | | 3. Robert Mackowiak | POL | 45.26s | 8 | | 4. Roxbert Martin | JAM | 45.37s | 6 | | 5. Stefan Balosak |  SVK | 45.48s | 5 | | 6. Matthias Rusterholz |  SUI | 45.89s | 1 | | 7. Alejandro Cardenas |  MEX | 46.63s | 7 | | 8. Ju-Il Shon |  KOR | 47.36s | 2 |
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| Heat 2 18.07h | | time | L | | 1. Jamie Baulch | GBR | 45.06s | 6 | | 2. Davis Kamoga | UGA | 45.25s | 3 | | 3. Ibrahima Wade | SEN | 45.38s | 7 | | 4. Michael Johnson | USA | 45.39s | 4 | | 5. Eswort Coombs |  STV | 45.47s | 5 | | 6. Jean-Louis Rapnouil |  FRA | 46.14s | 1 | | 7. Tawanda Chiwira |  ZIM | 46.22s | 8 | | 8. Benjamin Youla |  CGO | 46.29s | 2 |
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| Heat 3 18.14h | | time | L | | 1. Clement Chukwu | NGR | 45.06s | 8 | | 2. Tyree Washington | USA | 45.09s | 3 | | 3. Davian Clarke | JAM | 45.27s | 6 | | 4. Hachim Ndiaye | SEN | 45.44s | 7 | | 5. Sugath Tillakeratne |  SRI | 46.11s | 5 | | 6. Kennedy Ochieng |  KEN | 46.28s | 1 | | 7. Marco Vaccari |  ITA | 46.32s | 2 | | -. Sanderlei Claro Parrela |  BRA | DNS | 4 |
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| Heat 4 18.21h | | time | L | | 1. Jerome Young | USA | 44.87s | 6 | | 2. Mark Richardson | GBR | 45.05s | 4 | | 3. Michael McDonald | JAM | 45.16s | 3 | | 4. Sunday Bada | NGR | 45.37s | 5 | | 5. Tomasz Czubak | POL | 45.41s | 1 | | 6. Ibrahim Ismail |  QAT | 46.12s | 7 | | 7. Samir-Adel Louahla |  ALG | 46.23s | 2 | | 8. Arnaud Malherbe |  RSA | 46.73s | 8 |
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| Heat 1 9.15h | | time | L | | 1. Jamie Baulch | GBR | 45.85s | 1 | | 2. Roxbert Martin | JAM | 46.04s | 3 | | 3. Tawanda Chiwira | ZIM | 46.09s | 7 | | 4. Benjamin Youla | CGO | 46.62s | 6 | | 5. Roman Galkin |  UKR | 46.82s | 4 | | 6. Antonio Andres |  ESP | 46.94s | 5 | | -. Neil De Silva |  TRI | DNF | 2 |
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| Heat 2 9.23h | | time | L | | 1. Michael McDonald | JAM | 45.89s | 3 | | 2. Davis Kamoga | UGA | 46.17s | 5 | | 3. Alejandro Cardenas | MEX | 46.26s | 6 | | 4. Ju-Il Shon | KOR | 47.47s | 7 | | 5. Liod Kgopong | RSA | 47.66s | 2 | | 6. Kendon Maynard |  ISV | 47.83s | 4 | | 7. Mohsin Munir |  PAK | 49.61s | 8 | | -. Jude Monye | NGR | DNS | 1 |
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| Heat 3 9.31h | | time | L | | 1. Sanderlei Claro Parrela | BRA | 45.35s | 4 | | 2. Tyree Washington | USA | 45.35s | 1 | | 3. Sugath Tillakeratne | SRI | 45.58s | 7 | | 4. Ibrahima Wade | SEN | 45.61s | 6 | | 5. Matthias Rusterholz | SUI | 45.76s | 2 | | 6. Jean-Louis Rapnouil | FRA | 45.85s | 3 | | 7. Kenmore Hughes |  ANT | 47.11s | 5 |
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| Heat 4 9.39h | | time | L | | 1. Iwan Thomas | GBR | 45.62s | 7 | | 2. Davian Clarke | JAM | 45.77s | 6 | | 3. Tomasz Czubak | POL | 45.82s | 5 | | 4. Arnaud Malherbe | RSA | 46.08s | 1 | | 5. Samir-Adel Louahla | ALG | 46.22s | 2 | | 6. Konstantinos Moumoulidis |  GRE | 46.64s | 4 | | 7. Evripides Demosthenous |  CYP | 47.57s | 3 |
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| Heat 5 9.47h | | time | L | | 1. Michael Johnson | USA | 45.66s | 5 | | 2. Eswort Coombs | STV | 45.78s | 7 | | 3. Hachim Ndiaye | SEN | 45.84s | 2 | | 4. Kennedy Ochieng | KEN | 45.88s | 6 | | 5. Marco Vaccari | ITA | 46.00s | 4 | | 6. Odair Da Costa |  STP | 46.48s | 1 | | 7. Jan Podebradsky |  CZE | 46.52s | 3 |
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| Heat 6 9.55h | | time | L | | 1. Jerome Young | USA | 45.34s | 3 | | 2. Mark Richardson | GBR | 45.44s | 2 | | 3. Sunday Bada | NGR | 45.79s | 8 | | 4. Ibrahim Ismail | QAT | 45.88s | 7 | | 5. Soloveni Nakaunicina |  FIJ | 46.51s | 6 | | 6. Shigekazu Omori |  JPN | 47.09s | 1 | | 7. Eugene Farrell |  IRL | 48.20s | 4 | | 8. Bashir Mohamed Al Khewani |  YEM | 50.96s | 5 |
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| Heat 7 10.03h | | time | L | | 1. Antonio Pettigrew | USA | 45.67s | 1 | | 2. Stefan Balosak | SVK | 45.84s | 5 | | 3. Clement Chukwu | NGR | 46.10s | 3 | | 4. Robert Mackowiak | POL | 46.15s | 4 | | 5. Rafik Elouardi |  AUT | 46.95s | 6 | | 6. Dennis Darling |  BAH | 47.96s | 2 | | 7. Angelo Ignatius |  AHO | 49.01s | 7 |
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