| Final 10.08 Night | time | L | | 1. Kyle Chalmers | Australia | 47.58s WJR | 5 | | 2. Pieter Timmers | Belgyum | 47.80s NR | 7 | | 3. Nathan Adrian | United States | 47.85s | 4 | | 4. Santo Condorelli | Canada | 47.88s | 6 | | 5. Duncan Scott | Great Britain | 48.01s NR | 1 | | 6. Caeleb Dressel | United States | 48.02s | 2 | | 7. Cameron McEvoy | Australia | 48.12s | 3 | | 8. Marcelo Chierighini | Brazil | 48.41s | 8 |
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| Ranking | time | L | HR | | 1. Nathan Adrian | United States | 47.83s | 8 | 1 1. | | 2. Kyle Chalmers | Australia | 47.88s | 4 | 1 2. | | 3. Cameron McEvoy | Australia | 47.93s | 5 | 2 1. | | 3. Santo Condorelli | Canada | 47.93s | 3 | 2 2. | | 5. Caeleb Dressel | United States | 47.97s | 4 | 3 1. | | 6. Pieter Timmers | Belgyum | 48.14s | 2 | 3 2. | | 7. Duncan Scott | Great Britain | 48.20s | 5 | 4 2. | | 8. Marcelo Chierighini | Brazil | 48.23s | 1 | 5 2. | | eliminated | | 9. Vladimir Morozov | Russia | 48.26s | 6 | 4 1. | | 10.Sebastiaan Verschuren | Netherlands | 48.28s | 7 | 5 1. | | 10.Yuri Kisil | Canada | 48.28s | 7 | 6 2. | | 12.Ning Zetao | China | 48.37s | 1 | 6 1. | | 13.Luca Dotto | Italy | 48.49s | 2 | 7 1. | | 14.Clément Mignon | France | 48.57s | 8 | 7 2. | | 15.Damian Wierling | Germany | 48.66s | 6 | 8 2. | | 16.Joseph Schooling | Singapore | 48.70s | 3 | 8 1. |
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| Ranking | time | L | H | | 1. Kyle Chalmers | Australia | 47.90s | 3 | 7. | | 2. Caeleb Dressel | United States | 47.91s | 2 | 7. | | 3. Duncan Scott | Great Britain | 48.01s | 6 | 5. | | 4. Cameron McEvoy | Australia | 48.12s | 4 | 8. | | 5. Santo Condorelli | Canada | 48.22s | 5 | 6. | | 6. Joseph Schooling | Singapore | 48.27s | 8 | 6. | | 7. Damian Wierling | Germany | 48.35s | 8 | 8. | | 8. Vladimir Morozov | Russia | 48.39s | 3 | 6. | | 9. Pieter Timmers | Belgyum | 48.46s | 2 | 8. | | 10.Luca Dotto | Italy | 48.47s | 5 | 8. | | 11.Yuri Kisil | Canada | 48.49s | 8 | 7. | | 12.Sebastiaan Verschuren | Netherlands | 48.51s | 2 | 6. | | 13.Marcelo Chierighini | Brazil | 48.53s | 6 | 6. | | 14.Ning Zetao | China | 48.57s | 4 | 6. | | 14.Clément Mignon | France | 48.57s | 3 | 8. | | 16.Nathan Adrian | United States | 48.58s | 4 | 7. | | eliminated | | 17.Katsumi Nakamura | Japan | 48.61s | 1 | 6. | | 18.Stravius Jérémy | France | 48.62s | 5 | 7. | | 19.Glenn Surgeloose | Belgyum | 48.65s | 5 | 5. | | 20.Kristian Gkolomeev | Greece | 48.68s | 1 | 5. | | 21.Andrey Grechin | Russia | 48.75s | 6 | 7. | | 22.Federico Grabich | Argentina | 48.78s | 6 | 8. | | 23.Dylan Carter | Trinidad Tobago | 48.80s | 2 | 4. | | 24.Richárd Bohus | Hungary | 48.86s | 6 | 4. | | 25.Yu Hexin | China | 48.87s | 7 | 6. | | 26.Dominik Kozma | Hungary | 48.92s | 4 | 4. | | 27.Shinri Shioura | Japan | 48.94s | 7 | 7. | | below Olympic Qualifyng Time 48.99s. | | 28.Nicolas Oliveira | Brazil | 49.05s | 7 | 8. | | 29.Benjamin Proud | Great Britain | 49.14s | 1 | 7. | | 30.Simonas Bilis | Lithuania | 49.16s | 4 | 5. | | 31.Oussama Sahnoune | Algeria | 49.20s | 4 | 3. | | 32.Park Tae-hwan | South Korea | 49.24s | 3 | 4. | | 32.Velimir Stjepanović | Serbia | 49.24s | 1 | 8. | | 34.Cristian Quintero | Venezuela | 49.25s | 1 | 4. | | 35.Yauhen Tsurkin | Belarus | 49.37s | 5 | 4. | | 36.Anže Tavčar | Slovenia | 49.38s | 8 | 5. | | 37.Filippo Magnini | Italy | 49.40s | 7 | 5. | | 38.Marius Radu | Romania | 49.57s | 2 | 5. | | 39.Björn Hornikel | Germany | 49.62s | 3 | 5. | | 40.Shane Ryan | Ireland | 49.82s | 2 | 3. | | 41.Aleksandar Nikolov | Bulgaria | 50.08s | 3 | 3. | | 42.Ari-Pekka Liukkonen | Finland | 50.14s | 7 | 4. | | 42.Matthew Stanley | New Zealand | 50.14s | 8 | 4. | | 44.Benjamin Hockin | Paraguay | 50.26s | 5 | 3. | | 45.Igor Mogne | Mozambique | 50.65s | 6 | 2. | | 45.Ziv Kalontarov | Israel | 50.65s | 6 | 3. | | below Olympic Selection Time (OST) 50.70s. | | 47.Raphaël Stacchiotti | Luxembourg | 50.79s | 8 | 3. | | 48.Sean Gunn | Zimbabwe | 50.87s | 5 | 2. | | 49.Bradley Vincent | Mauritius | 50.89s | 7 | 3. | | 50.Matthew Abeysinghe | Sri Lanka | 50.96s | 4 | 2. | | 51.Andrew Chetcuti | Malta | 51.37s | 3 | 2. | | 52.Jhonny Pérez | Dominicana | 51.50s | 4 | 1. | | 53.Nicholas Magana | Peru | 51.53s | 1 | 3. | | 54.Thibaut Amani Danho | Ivory Coast | 52.78s | 3 | 1. | | 55.Miguel Mena | Nicaragua | 53.40s | 2 | 2. | | 56.Rami Anis | Refugee Olympic Team | 54.35s | 1 | 2. | | 57.Pou Sovijja | Cambodia | 54.55s | 7 | 2. | | 58.Sirish Gurung | Nepal | 57.76s | 8 | 2. | | 59.Robel Kiros Habte | Ethiopia | 1:04.95 | 5 | 1. |
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| Olympic Qualifyng Time (OQT) 48.99s - NOC can enter up to 2 swimmers with OQT. | | Olympic Selection Time (OST) 50.70s, invitational - A swwimer meeting the "invitation" standard was eligible for entry. But this entry was allotted/filled by ranking. |
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| Olympic Qualifyng Time by NOC - 38 Swimmers - addtional 21 Swimmers. | | Olympic Qualifying Time – 48.99s | | 2 Quotas - 14 NOC | | 2 | Australia | Kyle Chalmers | Cameron McEvoy | | 2 | Belgium | Glenn Surgeloose | Pieter Timmers | | 2 | Brazil | Marcelo Chierighini | Nicolas Oliveira | | 2 | Canada | Santo Condorelli | Yuri Kisil | | 2 | China | Ning Zetao | Yu Hexin | | 2 | France | Clément Mignon | Stravius Jérémy | | 2 | Germany | Björn Hornikel | Damian Wierling | | 2 | Great_Britain | Benjamin Proud | Duncan Scott | | 2 | Hungary | Richárd Bohus | Dominik Kozma | | 2 | Italy | Luca Dotto | Filippo Magnini | | 2 | Japan | Katsumi Nakamura | Shinri Shioura | | 2 | Poland | Konrad Czerniak | Paweł Korzeniewski | | 2 | Russia | Andrey Grechin | Vladimir Morozov | | 2 | United_States | Nathan Adrian | Caeleb Dressel | | 1 Quota - 10 NOC | | 1 | Argentina | Federico Grabich | | 1 | Belarus | Yauhen Tsurkin | | 1 | Greece | Kristian Golomeev | | 1 | Lithuania | Simonas Bilis | | 1 | Netherlands | Sebastiaan Verschuren | | 1 | Romania | Marius Radu | | 1 | Serbia | Velimir Stjepanović | | 1 | Singapore | Joseph Schooling | | 1 | Slovenia | Anže Tavčar | | 1 | South_Korea | Park Tae-hwan | | Olympic Selection Time – 50.70 - 12 NOC | | 1 | Bulgaria | Aleksandar Nikolov | [b] | | 1 | Finland | Ari-Pekka Liukkonen | [Men 50m Freestyle] | | 1 | Ireland | Shane Ryan | [Men 100m Backstroke] | | 1 | Israel | Ziv Kalontorov | [a] | | 1 | Luxembourg | Raphaël Stacchiotti | [b] | | 1 | Mauritius | Bradley Vincent | [b] | | 1 | New_Zealand | Matthew Stanley | [Men 200m Freestyle] | | 1 | Paraguay | Benjamin Hockin | [b] | | 1 | Peru | Nicholás Magana | [b] | | 1 | Sri Lanka | Matthew Abeysinghe | [b] | | 1 | Trinidad Tobago | Dylan Carter | | 1 | Venezuela | Cristian Quintero | [Men 200m Freestyle] | | Universalitiy Places - 9 NOC | | 1 | Cambodia | Pou Sovijja | | 1 | Ivory Coast | Thibaut Danho | | 1 | Dominican Republic | Jhonny Peréz | | 1 | Ethiopia | Robel Habte | | 1 | Malta | Andrew Chetcuti | | 1 | Mozambique | Igor Mogne | | 1 | Nepal | Shirish Gurung | | 1 | Nicaragua | Miguel Mena | | 1 | Zimbabwe | Sean Gunn | | 59 | Total |
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