| Men 800m Athletics XXXI Olympic Games Rio de Janeiro 2016 - Monday, 15th August - Gold Nedal: David Lekuta Rudisha, Kenya     | 
| Final |   | time |   | gap | bib |  | 1. David Lekuta Rudisha |   Kenya | 1:42.15 | SB |   | 2696 |  | 2. Taoufik Makhloufi |   Algeria | 1:42.61 | NR | +0.46s | 2009 |  | 3. Clayton Murphy |   United States | 1:42.93 | PB | +1.78s | 3091 |  | 4. Pierre-Ambroise Bosse |   France | 1:43.41 | SB | +1.26s | 2415 |  | 5. Ferguson Cheruiyot Rotich |   Kenya | 1:43.55 | SB | +1.40s | 2695 |  | 6. Marcin Lewandowski |   Poland | 1:44.20 | SB | +2.05s | 2844 |  | 7. Alfred Kipketer |   Kenya | 1:46.02 |   | +3.83s | 2681 |  | 8. Boris Berian |   United States | 1:46.15 |   | +4.00s | 3050 |   
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| 58 Competitors from 39 Nations. Venue: Estádio Olímpico João Havelange Cap: 46,931. |  | World and Olympic Record: David Rudisha, Kenya 1:40.91 London, United Kingdom 9 August 2012  |   
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 Semi-Finals - Saturday, 13th August 22:08 |  | First 2 and Best 2 times advanced to Final.  |   
| Semi 1 |   | time |   |  | 1. Pierre-Ambroise Bosse |   France | 1:43.85 | Q, SB |  | 2. Taoufik Makhloufi |   Algeria | 1:43.85 | Q, SB |  | 3. Marcin Lewandowski |   Poland | 1:44.56 | q, SB |  | 4. Ferguson Cheruiyot Rotich |   Kenya | 1:44.65 | q |  | 5. Mostafa Smaili |   Morocco | 1:45.78 |   |  | 6. Kléberson Davide |   Brazil | 1:46.19 |   |  | 7. Andrés Arroyo |   Puerto Rico | 1:46.74 |   |  | 8. Michael Rimmer |   Great Britain | 1:46.80 |   |   
| Semi 2 |   | time |   |  | Semi 3 |   | time |   |  | 1. Alfred Kipketer |   Kenya | 1:44.38 | Q |  | 2. Boris Berian |   United States | 1:44.56 | Q |  | 3. Yassine Hathat |   Algeria | 1:44.81 | PB |  | 4. Amel Tuka |   Bosnia Herzegovina | 1:45.24 |   |  | 5. Reinhardt van Rensburg |   South Africa | 1:45.33 | PB |  | 6. Brandon McBride |   Canada | 1:45.41 |   |  | 7. Andreas Bube |   Denmark | 1:45.87 | SB |  | 8. Mohammed Aman |   Ethiopia | 1:46.14 |   |   
| 1. David Lekuta Rudisha |   Kenya | 1:43.88 | Q |  | 2. Clayton Murphy |   United States | 1:44.30 | Q, PB |  | 3. Adam Kszczot |   Poland | 1:44.70 |   |  | 4. Ayanleh Souleiman |   Djibouti | 1:45.19 |   |  | 5. Mark English |   Ireland | 1:45.93 |   |  | 6. Giordano Benedetti |   Italy | 1:46.41 | SB |  | 7. Amine Belferar |   Algeria | 1:46.55 |   |  | 8. Hamada Mohamed |   Egypt | 1:48.17 |   |   
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 Heats - Friday, 12th August 10:10 | 
| First 2 and Best 4 times advanced to Semi-Finals.  | 
| Heat 1 |   | time |   |  | 1. Ayanleh Souleiman |   Djibouti | 1:45.48 | Q |  | 2. Amel Tuka |   Bosnia Herzegovina | 1:45.72 | Q |  | 3. Boris Berian |   United States | 1:45.87 | Q |  | 4. Kléberson Davide |   Brazil | 1:46.14 | q |  | 5. Žan Rudolf |   Slovenia | 1:46.93 | SB |  | 6. Antoine Gakeme |   Burundi | 1:47.46 |   |  | 7. Musa Hajdari |   Kosovo | 1:48.41 |   |  | -. Abraham Rotich |   Bahrain | R163.3a | DQ |   
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| Heat 2 |   | time |   |  | 1. Adam Kszczot |   Poland | 1:45.83 | Q |  | 2. Ferguson Cheruiyot Rotich |   Kenya | 1:46.00 | Q |  | 3. Andrés Arroyo |   Puerto Rico | 1:46.17 | Q |  | 4. Hamada Mohamed |   Egypt | 1:46.65 | q |  | 5. Rafith Rodríguez |   Colombia | 1:46.65 | SB |  | 6. Boitumelo Masilo |   Botswana | 1:48.48 |   |  | 7. Luke Mathews |   Australia | 1:50.17 |   |  | 8. Brice Etès |   Monaco | 1:50.40 |   |   
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| Heat 3 |   | time |   |  | 1. David Lekuta Rudisha |   Kenya | 1:45.09 | Q |  | 2. Reinhardt van Rensburg |   South Africa | 1:45.67 | Q, SB |  | 3. Michael Rimmer |   Great Britain | 1:45.99 | Q |  | 4. Clayton Murphy |   United States | 1:46.18 | q |  | 5. Jinson Johnson |   India | 1:47.27 |   |  | 6. Anthony Romaniw |   Canada | 1:47.59 |   |  | 7. Lutimar Paes |   Brazil | 1:48.38 |   |  | 8. Benjamín Enzema |   Equatorial Guinea | 1:52.14 |   |  | 9. Alex Beddoes |   Cook Islands | 1:52.76 | PB |   
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| Heat 4 |   | time |   |  | 1. Alfred Kipketer |   Kenya | 1:46.61 | Q |  | 2. Andreas Bube |   Denmark | 1:46.67 | Q |  | 3. Yassine Hathat |   Algeria | 1:46.81 | Q |  | 4. Álvaro de Arriba |   Spain | 1:46.86 |   |  | 5. Wesley Vázquez |   Puerto Rico | 1:46.96 |   |  | 6. Charles Jock |   United States | 1:47.06 |   |  | 7. Elliot Giles |   Great Britain | 1:47.88 |   |  | 8. Yiech Biel |   Refugee OT | 1:54.67 |   |  | -. Joshua Ilustre |   Guam | R163.3a | DQ |   
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| Heat 5 |   | time |   |  | 1. Taoufik Makhloufi |   Algeria | 1:49.17 | Q |  | 2. Mostafa Smaili |   Morocco | 1:49.29 | Q |  | 3. Giordano Benedetti |   Italy | 1:49.40 | Q |  | 4. Sho Kawamoto |   Japan | 1:49.41 |   |  | 5. Jacob Rozani |   South Africa | 1:49.79 |   |  | 6. Jozef Repčík |   Slovakia | 1:49.95 |   |  | 7. Nijel Amos |   Botswana | 1:50.46 |   |  | 8. Kevin López |   Spain | 1:53.41 |   |   
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| Heat 6 |   | time |   |  | 1. Brandon McBride |   Canada | 1:45.99 | Q |  | 2. Marcin Lewandowski |   Poland | 1:46.35 | Q |  | 3. Mark English |   Ireland | 1:46.40 | Q |  | 4. Jeff Riseley |   Australia | 1:46.93 |   |  | 5. Abubaker Haydar Abdalla |   Qatar | 1:47.81 |   |  | 6. Pol Moya |   Andorra | 1:48.88 |   |  | 7. Alex Amankwah |   Ghana | 1:50.33 |   |  | -. Abdelati El Guesse |   Morocco | DNF |   |   
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