| Final 21:25 | time | L | React. | | 1. Justin Gatlin |  USA | 9.88s | 5 | 0.157 | | 2. Michael Frater |  JAM | 10.05s | 4 | 0.141 | | 3. Kim Collins |  SKN | 10.05s | 2 | 0.146 | | 4. Francis Obikwelu |  POR | 10.07s | 8 | 0.134 | | 5. Dwight Thomas | JAM | 10.09s | 7 | 0.138 | | 6. Leonard Scott | USA | 10.13s | 3 | 0.123 | | 7. Marc Burns |  TRI | 10.14s | 1 | 0.165 | | 8. Aziz Zakari |  GHA | 10.20s | 6 | 0.131 |
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| Standard A: 10.21s | Standard B: 10.28s |
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Until two weeks prior to the championships this was one of the most eagerly anticipated events. Then, the world record setter Asafa Powell was injured in London, and the race lost some of its gloss. Six of the heats were won in 10.19 or quicker, with Scott the fastest in 10.12. The second round saw Paris silver medallist Darrel Brown produce the fastest time (10.10) in the final heat, which saw five men qualify for the semi-finals. Olympic Champion and hot favourite Gatlin had won his heat and second round without pressing, but in the semi-finals he led by a metre before easing up in 9.99. The first heat had been won by Scott in 10.09 with a light following wind (0.5), while Gatlin’s time had been run into a 1.0 wind – making Britain’s Jason Gardener somewhat unlucky not to make the final after running 10.08 in Gatlin’s heat.
Scott, always a good starter, headed the field in the final after reacting fastest and driving powerfully out of the blocks. By 30m he was half a metre up on the field, with Collins and the slow-starting Gatlin battling for second. At 60m Gatlin had caught Scott, and the heavilymuscled (1.81/84kg) Scott began to fade, and Gatlin surged ahead. By the finish he was almost 2m clear. Texas Christian University graduates Frater and Collins filled the lesser medal positions. The race was run at 9.30pm with the temperature at 18°C, less than perfect conditions for a fast time.
“Even if Asafa had been in the race I’d have been number one,” said Gatlin, who went on to win the Helsinki 200m. “I’m the one who came to the big dance and stopped the show.”
| Semi 19:20 | time | L | | 1. Leonard Scott | USA | 10.08s | 3 | | 2. Michael Frater | JAM | 10.09s | 7 | | 3. Marc Burns | TRI | 10.12s | 8 | | 4. Francis Obikwelu | POR | 10.13s | 4 | | 5. A. Olusoji Fasuba |  NGR | 10.18s | 5 | | 6. Marlon Devonish |  GBR | 10.24s | 2 | | 7. Joshua Ross |  AUS | 10.27s | 1 | | 8. Shawn Crawford | USA | 10.28s | 6 |
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| Semi 2 19:28 | time | L | | 1. Justin Gatlin | USA | 9.99s | 3 | | 2. Aziz Zakari | GHA | 10.00s | 1 | | 3. Dwight Thomas | JAM | 10.06s | 4 | | 4. Kim Collins | SKN | 10.07s | 7 | | 5. Jason Gardener | GBR | 10.08s | 8 | | 6. Uchenna Emedolu | NGR | 10.16s | 2 | | 7. Darrel Brown | TRI | 10.16s | 6 | | 8. Ronald Pognon |  FRA | 10.17s | 5 |
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| Quarter 1 18:45 | time | L | | 1. Justin Gatlin | USA | 10.27s | 3 | | 2. Dwight Thomas | JAM | 10.28s | 5 | | 3. Aziz Zakari | GHA | 10.41s | 4 | | 4. Patrick Johnson | AUS | 10.48s | 6 | | 5. Mark Lewis-Francis | GBR | 10.53s | 8 | | 6. Nobuharu Asahara |  JPN | 10.58s | 2 | | 7. Simone Collio |  ITA | 10.60s | 7 | | -. Lukasz Chyla |  POL | DNS | 1 |
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| Quarter 2 18:52 | time | L | | 1. Leonard Scott | USA | 10.19s | 5 | | 2. A. Olusoji Fasuba | NGR | 10.24s | 2 | | 3. Marc Burns | TRI | 10.29s | 6 | | 4. Kim Collins | SKN | 10.32s | 4 | | 5. Ainsley Waugh | JAM | 10.39s | 3 | | 6. Churandy Martina |  AHO | 10.48s | 7 | | 7. Guus Hoogmoed |  NED | 10.51s | 1 | | 8. Juan Sainfleur |  DOM | 10.74s | 8 |
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| Quarter 3 18:59 | time | L | | 1. Francis Obikwelu | POR | 10.19s | 5 | | 2. Shawn Crawford | USA | 10.25s | 4 | | 3. Jason Gardener | GBR | 10.31s | 6 | | 4. Joshua Ross | AUS | 10.31s | 3 | | 5. Deji Aliu | NGR | 10.39s | 1 | | 6. Jacey Harper | TRI | 10.39s | 7 | | 7. Matic Osovnikar |  SLO | 10.48s | 8 | | 8. Nicolas Macrozonaris |  CAN | 10.48s | 2 |
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| Quarter 4 19:06 | time | L | | 1. Darrel Brown | TRI | 10.10s | 2 | | 2. Ronald Pognon | FRA | 10.11s | 4 | | 3. Michael Frater | JAM | 10.12s | 5 | | 4. Uchenna Emedolu | NGR | 10.16s | 3 | | 5. Marlon Devonish | GBR | 10.20s | 6 | | 6. Obadele Thompson |  BAR | 10.34s | 1 | | 7. Salem Mubarak Al-Yami |  KSA | 10.48s | 7 | | 8. Idrissa Sanou |  BUR | 10.80s | 8 |
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| Heat 1 10:55 | time | L | | 1. Francis Obikwelu | POR | 10.17s | 2 | | 2. Shawn Crawford | USA | 10.23s | 1 | | 3. Simone Collio | ITA | 10.27s | 4 | | 4. Nicolas Macrozonaris | CAN | 10.40s | 8 | | 5. Philam Garcia |  GUM | 10.79s | 3 | | 6. Derrick Atkins |  BAH | 11.57s | 7 | | 7. Harmon Harmon |  COK | 11.84s | 6 | | 8. Mariuti Uan |  KIR | 11.92s | 5 |
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| Heat 2 11:03 | time | L | | 1. Ronald Pognon | FRA | 10.15s | 4 | | 2. Ainsley Waugh | JAM | 10.16s | 1 | | 3. A. Fasuba Olusoji | NGR | 10.19s | 7 | | 4. Guus Hoogmoed | NED | 10.31s | 8 | | 5. Lukasz Chyla | POL | 10.39s | 6 | | 6. Shameer Ayub |  SIN | 10.82s | 3 | | 7. Chi Kun Au |  MAC | 11.11s | 2 | | -. Khalid Brooks |  AIA | DNS | 5 |
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| Heat 3 11:11 | time | L | | 1. Dwight Thomas | JAM | 10.15s | 6 | | 2. Patrick Johnson | AUS | 10.20s | 7 | | 3. Darrel Brown | TRI | 10.25s | 4 | | 4. Matic Osovnikar | SLO | 10.40s | 2 | | 5. Markus Poyhonen |  FIN | 10.49s | 3 | | 6. Souhalia Alamou |  BEN | 10.90s | 5 | | 7. Wally Kirika |  PNG | 11.01s | 1 | | -. Domeio Kabua |  MSH | DNS | 8 |
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| Heat 4 11:19 | time | L | | 1. Justin Gatlin | USA | 10.16s | 3 | | 2. Joshua Ross | AUS | 10.28s | 5 | | 3. Nobuharu Asahara | JPN | 10.40s | 4 | | 4. Mark Lewis-Francis | GBR | 10.40s | 2 | | 5. Leigh Julius |  RSA | 10.51s | 8 | | 6. Darrel Roligat |  NMA | 11.49s | 6 | | 7. Daraphirit Sam |  CAM | 11.85s | 7 |
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| Heat 5 11:27 | time | L | | 1. Leonard Scott | USA | 10.12s | 4 | | 2. Uchenna Emedolu | NGR | 10.17s | 7 | | 3. Jacey Harper | TRI | 10.31s | 2 | | 4. Obadele Thompson | BAR | 10.32s | 5 | | 5. Pierre Browne | CAN | 10.50s | 8 | | 6. Deamo Baguga |  NRU | 11.64s | 6 | | 7. Phomma Kheuabmavong |  LAO | 11.83s | 3 |
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| Heat 6 11:35 | time | L | | 1. Marlon Devonish | GBR | 10.25s | 1 | | 2. Marc Burns | TRI | 10.42s | 6 | | 3. Churandy Martina | AHO | 10.46s | 3 | | 4. Tlhalosang Molapisi |  BOT | 10.71s | 2 | | 5. Yazaldes Nascimento |  STP | 11.07s | 4 | | 6. John Howard |  FSM | 11.24s | 8 | | 7. Ali Shareef |  MDV | 11.44s | 7 | | -. Eric Pacome N'dri |  CIV | DNF | 5 |
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| Heat 7 11:43 | time | L | | 1. Kim Collins | SKN | 10.31s | 4 | | 2. Michael Frater | JAM | 10.32s | 7 | | 3. Idrissa Sanou | BUR | 10.43s | 8 | | 4. Salem Mubarak Al-Yami | KSA | 10.45s | 6 | | 5. Juan Sainfleur | DOM | 10.47s | 3 | | 6. Rolando Palacios |  HON | 10.73s | 2 | | 7. Wilfried Bingangoye |  GAB | 10.86s | 5 | | 8. Darren Gilford |  MLT | 10.89s | 1 |
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| Heat 8 11:51 | time | L | | 1. Jason Gardener | GBR | 10.19s | 7 | | 2. Aziz Zakari | GHA | 10.30s | 5 | | 3. Deji Aliu | NGR | 10.36s | 8 | | 4. Daniel Bailey |  ANT | 10.49s | 6 | | 5. Claudio Roberto Souza |  BRA | 10.55s | 4 | | 6. Fonseca Neto |  ANG | 11.01s | 1 | | 7. Reginaldo Micha Ndong |  GEQ | 11.57s | 2 | | -. Christie Van Wyk |  NAM | DNS | 3 |
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| Athlete | Team | S | L | 2005 | Best | | Justin Gatlin | USA | 4 | 3 | 9.89s | 9.85s | | Leonard Scott | USA | 5 | 4 | 9.94s | 9.94s | | Marc Burns | TRI | 6 | 6 | 9.96s | 9.96s | | Shawn Crawford | USA | 1 | 1 | 9.99s | 9.88s | | Ronald Pognon | FRA | 2 | 4 | 9.99s | 9.99s | | Darrel Brown | TRI | 3 | 4 | 9.99s | 9.99s | | Aziz Zakari | GHA | 8 | 5 | 9.99s | 9.99s | | Kim Collins | SKN | 7 | 4 | 10.00s | 9.98s | | Michael Frater | JAM | 7 | 7 | 10.03s | 10.03s | | Francis Obikwelu | POR | 1 | 2 | 10.04s | 9.86s | | Dwight Thomas | JAM | 3 | 6 | 10.05s | 10.05s | | Jason Gardener | GBR | 8 | 7 | 10.09s | 9.98s | | A. Olusoji Fasuba | NGR | 2 | 7 | 10.09s | 10.09s | | Jacey Harper | TRI | 5 | 2 | 10.10s | 10.10s | | Churandy Martina | AHO | 6 | 3 | 10.10s | 10.10s | | Joshua Ross | AUS | 4 | 5 | 10.12s | 10.12s | | Uchenna Emedolu | NGR | 5 | 7 | 10.13s | 9.97s | | Mark Lewis-Francis | GBR | 4 | 2 | 10.13s | 10.04s | | Deji Aliu | NGR | 8 | 8 | 10.19s | 9.95s | | Marlon Devonish | GBR | 6 | 1 | 10.19s | 10.13s | | Ainsley Waugh | JAM | 2 | 1 | 10.20s | 10.20s | | Patrick Johnson | AUS | 3 | 7 | 10.21s | 9.93s | | Salem Mubarak Al-Yami | KSA | 7 | 6 | 10.21s | 10.13s | | Idrissa Sanou | BUR | 7 | 8 | 10.21s | 10.14s | | Derrick Atkins | BAH | 1 | 7 | 10.21s | 10.21s |
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| Athlete | Team | S | L | 2005 | Best | | Simone Collio | ITA | 1 | 4 | 10.22s | 10.20s | | Matic Osovnikar | SLO | 3 | 2 | 10.24s | 10.15s | | Claudio Roberto Souza | BRA | 8 | 4 | 10.25s | 10.19s | | Guus Hoogmoed | NED | 2 | 8 | 10.25s | 10.25s | | Pierre Browne | CAN | 5 | 8 | 10.27s | 10.12s | | Leigh Julius | RSA | 4 | 8 | 10.27s | 10.27s | | Tlhalosang Molapisi | BOT | 6 | 2 | 10.27s | 10.27s |
| Athlete | Team | S | L | 2005 | Best | | Nobuharu Asahara | JPN | 4 | 4 | 10.29s | 10.02s | | Obadele Thompson | BAR | 5 | 5 | 10.30s | 9.87s | | Eric Pacome N'dri | CIV | 6 | 5 | 10.31s | 10.17s | | Lukasz Chyla | POL | 2 | 6 | 10.32s | 10.20s | | Daniel Bailey | ANT | 8 | 6 | 10.36s | 10.19s | | Markus Poyhonen | FIN | 3 | 3 | 10.38s | 10.23s | | Nicolas Macrozonaris | CAN | 1 | 8 | 10.41s | 10.03s | | Darrel Roligat | NMA | 4 | 6 | 11.41s | 11.41s | | Juan Sainfleur | DOM | 7 | 3 | 10.42s | 10.22s | | Darren Gilford | MLT | 7 | 1 | 10.54s | 10.54s | | Philam Garcia | GUM | 1 | 3 | 10.78s | 10.66s | | Wally Kirika | PNG | 3 | 1 | 10.87s | 10.87s | | Kun Chi Au | MAC | 2 | 2 | 10.96s | 10.76s | | Reginaldo Micha Ndong | GEQ | 8 | 2 | 10.96s | 10.96s | | Ali Shareef | MDV | 6 | 7 | 11.18s | 11.18s | | Phomma Kheuabmavong | LAO | 5 | 3 | 11.20s | 11.19s | | Daraphirit Sam | CAM | 4 | 7 | 11.30s | 11.30s | | Deamo Baguga | NRU | 5 | 6 | 11.92s | 11.89s | | John Howard | FSM | 6 | 8 | 12.09s | 10.85s | | Christie Van Wyk | NAM | 8 | 3 | - | 10.09s | | Souhalia Alamou | BEN | 3 | 5 | - | 10.31s | | Shameer Ayub | SIN | 2 | 3 | - | 10.60s | | Wilfried Bingangoye | GAB | 7 | 5 | - | 10.76s | | Rolando Palacios | HON | 7 | 2 | - | 10.84s | | Yazaldes Nascimento | STP | 6 | 4 | - | 11.00s | | Harmon Harmon | COK | 1 | 6 | - | 11.22s | | Mariuti Uan | KIR | 1 | 5 | - | - | | Khalid Brooks | AIA | 2 | 5 | - | - | | Domeio Kabua | MSH | 3 | 8 | - | - | | Fonseca Neto | ANG | 8 | 1 | - | - |
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