# Swimming at the 2009 World Aquatics Championships – Men's 50 metre backstroke

The heats for the men's 50 metre backstroke race at the 2009 World Championships took place in the morning and evening of 1 August, with the final in the evening session of 2 August at the Foro Italico in Rome, Italy.

## Records

Prior to this competition, the existing world and competition records were as follows:
| World record | Randall Bal (USA) | 24.33 | Eindhoven, Netherlands | 5 December 2008 |
| Championship record | Thomas Rupprath (GER) | 24.80 | Barcelona, Spain | 27 July 2003 |
The following records were established during the competition:
| Date | Round | Name | Nationality | Time | Record |
| 1 August | Heat 13 | Guilherme Guido | Brazil | 24.49 | CR |
| 1 August | Semifinal 1 | Liam Tancock | Great Britain | 24.08 | WR |
| 2 August | Final | Liam Tancock | Great Britain | 24.04 | WR |

## Results
### Heats

| Rank | Name | Nationality | Time | Heat | Lane | Notes |
| 1 | Guilherme Guido | Brazil | 24.49 | 13 | 4 | CR, SA |
| 2 | Aschwin Wildeboer | Spain | 24.50 | 14 | 5 | NR |
| 3 | Camille Lacourt | France | 24.52 | 13 | 5 | NR |
| 4 | Liam Tancock | Great Britain | 24.55 | 15 | 8 | |
| 5 | Junya Koga | Japan | 24.57 | 15 | 4 | |
| 6 | Helge Meeuw | Germany | 24.60 | 14 | 4 | NR |
| 7 | Gerhard Zandberg | South Africa | 24.68 | 13 | 8 | AF |
| 8 | Flori Lang | Switzerland | 24.75 | 14 | 3 | NR |
| 9 | Juan Miguel Rando | Spain | 24.77 | 13 | 3 | |
| 10 | Guy Barnea | Israel | 24.79 | 14 | 9 | |
| 11 | Aristeidis Grigoriadis | Greece | 24.80 | 15 | 7 | |
| 12 | Ryosuke Irie | Japan | 24.87 | 15 | 6 | |
| 13 | Thomas Rupprath | Germany | 24.92 | 15 | 5 | |
| 14 | Daniel Orzechowski | Brazil | 24.97 | 14 | 8 | |
| 14 | Ashley Delaney | Australia | 24.97 | 15 | 3 | |
| 16 | Mirco Di Tora | Italy | 25.01 | 14 | 6 | |
| 17 | Nick Driebergen | Netherlands | 25.08 | 14 | 7 | NR |
| 18 | Enrico Catalano | Italy | 25.10 | 13 | 7 | |
| 19 | Matt Grevers | USA | 25.13 | 15 | 1 | |
| 20 | Pascal Wollach | Canada | 25.23 | 13 | 3 | NR |
| 21 | Vytautas Janušaitis | Lithuania | 25.24 | 11 | 5 | NR |
| 22 | Aaron Peirsol | USA | 25.30 | 14 | 1 | |
| 23 | Daniel Bell | New Zealand | 25.31 | 13 | 2 | |
| 24 | Benjamin Stasiulis | France | 25.32 | 13 | 6 | |
| 25 | Răzvan Florea | Romania | 25.34 | 14 | 2 | |
| 26 | Arkady Vyatchanin | Russia | 25.36 | 15 | 2 | |
| 27 | Charl Van Zyl | South Africa | 25.39 | 13 | 0 | |
| 28 | Karl Burdis | Ireland | 25.40 | 9 | 6 | NR |
| 29 | Marco Loughran | Great Britain | 25.44 | 12 | 6 | |
| 30 | Pavel Sankovich | Belarus | 25.53 | 12 | 3 | |
| 31 | Stanislav Donets | Russia | 25.54 | 12 | 4 | |
| 32 | Sung Min | South Korea | 25.57 | 15 | 0 | |
| 33 | Markus Rogan | Austria | 25.59 | 15 | 9 | |
| 34 | Jake Tapp | Canada | 25.68 | 12 | 9 | |
| 35 | Jeong Doohee | South Korea | 25.77 | 10 | 6 | |
| 36 | Bruno Claeys | Belgium | 25.84 | 13 | 9 | NR |
| 37 | Nadav Kochavi | Israel | 25.94 | 11 | 6 | |
| 38 | Danil Bugakov | Uzbekistan | 25.97 | 12 | 7 | |
| 39 | Cheng Feiyi | China | 26.01 | 12 | 2 | |
| 40 | Derya Büyükuncu | Turkey | 26.07 | 11 | 0 | |
| 41 | Radosław Kawęcki | Poland | 26.08 | 14 | 0 | |
| 42 | Andres Olvik | Estonia | 26.11 | 10 | 7 | NR |
| 43 | Krzysztof Jankiewicz | Poland | 26.19 | 12 | 5 | |
| 44 | Donal O'Neill | Ireland | 26.29 | 12 | 0 | |
| 45 | Pedro Medel | Cuba | 26.35 | 10 | 5 | |
| 46 | Tomas Fucik | Czech Republic | 26.40 | 9 | 2 | |
| 47 | Robi Zbogar | Slovenia | 26.41 | 10 | 4 | |
| 48 | Zhang Yu | China | 26.42 | 11 | 7 | |
| 49 | Jean-François Schneiders | Luxembourg | 26.54 | 12 | 8 | |
| 50 | David Dunford | Kenya | 26.62 | 8 | 6 | |
| 51 | Kaspar Raigla | Estonia | 26.63 | 9 | 8 | |
| 52 | Erwin Dokter | Austria | 26.68 | 11 | 3 | |
| 53 | Kouam Amine | Morocco | 26.69 | 11 | 8 | NR |
| 54 | Ng Kai Wee Rainer | Singapore | 26.70 | 10 | 8 | NR |
| 55 | Mindaugas Sadauskas | Lithuania | 26.71 | 7 | 7 | |
| 56 | Konstantins Blohins | Latvia | 26.72 | 8 | 2 | |
| 57 | Andrejs Dūda | Latvia | 26.84 | 8 | 1 | |
| 58 | Oliver Elliot Banados | Chile | 26.94 | 9 | 5 | |
| 59 | Nicholas James | Zimbabwe | 27.01 | 7 | 9 | NR |
| 60 | Stanislav Osinsky | Kazakhstan | 27.06 | 11 | 1 | |
| 61 | David Rodriguez | Cuba | 27.07 | 9 | 4 | |
| 62 | Christian Homer | Trinidad and Tobago | 27.10 | 9 | 9 | |
| 62 | Miguel Robles | Mexico | 27.10 | 10 | 1 | NR |
| 64 | Artiom Gladun | Moldova | 27.13 | 10 | 2 | |
| 65 | Nicolas Francia Vina | Uruguay | 27.29 | 11 | 4 | |
| 66 | Glenn Victor Sutanto | Indonesia | 27.32 | 11 | 9 | |
| 67 | Cheah Geoffrey Robin | Hong Kong | 27.36 | 8 | 4 | |
| 68 | Do Huy Long | Vietnam | 27.39 | 8 | 5 | |
| 68 | Grant Beahan | Zimbabwe | 27.39 | 8 | 0 | |
| 70 | Doğa Çelik | Turkey | 27.51 | 10 | 9 | |
| 71 | Jean Luis Gomez | Dominican Republic | 27.58 | 7 | 3 | NR |
| 72 | Kári J. á Høvdanum | Faroe Islands | 27.65 | 8 | 9 | NR |
| 73 | Rony Bakale | Republic of the Congo | 27.70 | 8 | 8 | |
| 74 | Radomyos Matjiur | Thailand | 27.73 | 10 | 0 | |
| 75 | Heshan Bandara Unamboowe | Sri Lanka | 27.83 | 7 | 1 | |
| 75 | Fernando Castellanos | Guatemala | 27.83 | 7 | 8 | |
| 77 | Yury Zaharov | Kyrgyzstan | 27.94 | 10 | 3 | |
| 78 | Zane Jordan | Zambia | 27.95 | 6 | 2 | |
| 79 | Mohammed Al Ghaferi | United Arab Emirates | 28.05 | 6 | 3 | |
| 80 | Antonio Tong | Macau | 28.15 | 8 | 7 | |
| 81 | Boris Kirillov | Azerbaijan | 28.36 | 6 | 4 | |
| 82 | Byron Briedenhann | Namibia | 28.38 | 6 | 9 | |
| 83 | Brett Fraser | Cayman Islands | 28.47 | 6 | 6 | |
| 84 | Joao Matias | Angola | 28.48 | 7 | 0 | |
| 85 | Samson Opuakpo | Nigeria | 28.57 | 5 | 6 | |
| 85 | Khachik Plavchyan | Armenia | 28.57 | 7 | 6 | |
| 87 | Tsung Chao-Lin | Chinese Taipei | 28.62 | 9 | 0 | |
| 88 | Abbas Raad | Lebanon | 28.70 | 6 | 0 | |
| 89 | Mario Montoya | Costa Rica | 28.85 | 6 | 5 | |
| 90 | Erik Rajohnson | Madagascar | 28.90 | 9 | 3 | |
| 91 | Marcelino Richaards | Suriname | 29.16 | 6 | 1 | |
| 92 | Ronny Vencatachellum | Mauritius | 29.18 | 5 | 5 | |
| 93 | Tural Abbasov | Azerbaijan | 29.28 | 7 | 4 | |
| 94 | Faiz Muhammad | Pakistan | 29.33 | 5 | 8 | NR |
| 95 | Nicholas Coard | Grenada | 29.60 | 5 | 1 | |
| 96 | Matar Samb | Senegal | 29.61 | 5 | 4 | |
| 97 | Jean-Luc Augier | Saint Lucia | 29.66 | 4 | 1 | |
| 98 | Kerson Hadley | Federated States of Micronesia | 29.71 | 3 | 4 | |
| 99 | Kailan Staal | Northern Mariana Islands | 29.75 | 4 | 6 | |
| 100 | Andrey Molchanov | Turkmenistan | 29.76 | 3 | 2 | |
| 101 | Mark Sammut | Malta | 29.82 | 5 | 9 | |
| 102 | Heimanu Sichan | French Polynesia | 29.99 | 5 | 7 | |
| 102 | Ngou Pok Man | Macau | 29.99 | 12 | 1 | |
| 104 | Rainui Teriipaia | French Polynesia | 30.15 | 5 | 2 | |
| 105 | Milimo Mweetwa | Zambia | 30.18 | 4 | 5 | |
| 106 | Ivo Chilaule | Mozambique | 30.35 | 2 | 4 | |
| 107 | Batsaikhan Dulguun | Mongolia | 30.41 | 6 | 8 | |
| 108 | Peter Popahun Pokawin | Papua New Guinea | 30.56 | 4 | 7 | |
| 109 | Carlos Alberto | Angola | 30.64 | 4 | 4 | |
| 110 | Pepelate Gbagi | Nigeria | 30.83 | 4 | 9 | |
| 111 | Douglas Miller | Fiji | 30.95 | 3 | 1 | |
| 112 | Mathieu Marquet | Mauritius | 31.18 | 4 | 3 | |
| 113 | Gary Pineda | Guatemala | 31.46 | 3 | 3 | |
| 114 | Juan Carlos Sikaffy Diaz | Honduras | 31.47 | 4 | 2 | |
| 115 | Henk Aloysius Lowe | Guyana | 31.53 | 1 | 2 | |
| 116 | Daniel Kevin Pryke | Papua New Guinea | 31.55 | 3 | 8 | |
| 117 | Timur Atahanov | Turkmenistan | 31.58 | 3 | 7 | |
| 118 | Patricio Vera | Mozambique | 31.66 | 7 | 2 | |
| 119 | Siu Kent Chung | Brunei | 31.74 | 3 | 5 | |
| 120 | Mario Sulkja | Albania | 31.88 | 5 | 0 | |
| 121 | Saif Alaslam Saeed Al-Saadi | Iraq | 32.22 | 2 | 0 | |
| 122 | Jake Villarreal | Marshall Islands | 32.26 | 2 | 6 | |
| 123 | Elaijie Erasito | Fiji | 32.82 | 3 | 0 | |
| 124 | Quenton Dupont | Eswatini | 33.07 | 2 | 3 | |
| 125 | Mohamed Mujahid | Maldives | 34.06 | 2 | 7 | |
| 126 | Shameel Ibrahim | Maldives | 34.66 | 2 | 2 | |
| 127 | Omar Abdalla | Tanzania | 37.84 | 2 | 9 | |
| 128 | Nsumizi Alain Boris | Burundi | 39.17 | 3 | 6 | |
| 129 | Said Seba | Tanzania | 43.64 | 1 | 4 | |
| 130 | Isidore Lokossou Krobli | Benin | 46.10 | 1 | 1 | |
| – | Alejandro Jacobo | Mexico | DNS | 1 | 3 | |
| – | Mohamed Bangura | Sierra Leone | DNS | 1 | 5 | |
| – | Abdoulkader Houssein | Djibouti | DNS | 2 | 1 | |
| – | Habonimana Yves | Burundi | DNS | 2 | 5 | |
| – | Houmed Hassan Ali | Djibouti | DNS | 2 | 8 | |
| – | Branden Whitehurst | United States Virgin Islands | DNS | 3 | 9 | |
| – | Hocine Haciane | Andorra | DNS | 4 | 8 | |
| – | Achelhi Bilal | Morocco | DNS | 5 | 3 | |
| – | Nicholas Thomson | Bermuda | DNS | 6 | 7 | |
| – | Charles William Walker | Philippines | DNS | 8 | 3 | |
| – | Omar Pinzón | Colombia | DNS | 9 | 7 | |
| – | Albert Subirats | Venezuela | DNS | 11 | 2 | |

### Semifinals

| Rank | Name | Nationality | Time | Heat | Lane | Notes |
| 1 | Liam Tancock | Great Britain | 24.08 | 1 | 5 | WR |
| 2 | Junya Koga | Japan | 24.29 | 2 | 3 | AS |
| 3 | Camille Lacourt | France | 24.46 | 2 | 5 | NR |
| 4 | Aschwin Wildeboer | Spain | 24.48 | 1 | 4 | NR |
| 5 | Helge Meeuw | Germany | 24.59 | 1 | 3 | NR |
| 6 | Gerhard Zandberg | South Africa | 24.68 | 2 | 6 | =AF |
| 7 | Mirco Di Tora | Italy | 24.77 | 1 | 8 | NR |
| 7 | Aristeidis Grigoriadis | Greece | 24.77 | 2 | 7 | NR |
| 9 | Flori Lang | Switzerland | 24.78 | 1 | 6 | |
| 10 | Ryosuke Irie | Japan | 24.79 | 1 | 7 | |
| 11 | Juan Miguel Rando | Spain | 24.80 | 2 | 2 | |
| 12 | Guy Barnea | Israel | 24.81 | 1 | 2 | |
| 13 | Thomas Rupprath | Germany | 24.87 | 2 | 1 | |
| 14 | Daniel Orzechowski | Brazil | 24.92 | 1 | 1 | |
| 15 | Guilherme Guido | Brazil | 24.98 | 2 | 4 | |
| 16 | Ashley Delaney | Australia | 25.02 | 2 | 8 | |

### Final

| Rank | Name | Nationality | Time | Lane | Notes |
| | Liam Tancock | Great Britain | 24.04 | 4 | WR |
| | Junya Koga | Japan | 24.24 | 5 | AS |
| | Gerhard Zandberg | South Africa | 24.34 | 7 | AF |
| 4 | Aschwin Wildeboer | Spain | 24.57 | 6 | |
| 5 | Camille Lacourt | France | 24.61 | 3 | |
| 6 | Helge Meeuw | Germany | 24.63 | 2 | |
| 7 | Aristeidis Grigoriadis | Greece | 24.87 | 8 | |
| 8 | Mirco Di Tora | Italy | 25.15 | 1 | |