# Swimming at the 2013 World Aquatics Championships – Men's 100 metre butterfly

The men's 100 metre butterfly event in swimming at the 2013 World Aquatics Championships took place on 2–3 August at the Palau Sant Jordi in Barcelona, Spain.

## Records

Prior to this competition, the existing world and championship records were:
| World record | Michael Phelps (USA) | 49.82 | Rome, Italy | 1 August 2009 |
| Competition record | Michael Phelps (USA) | 49.82 | Rome, Italy | 1 August 2009 |

## Results
### Heats

The heats were held at 10:39.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | 4 | Yevgeny Korotyshkin | Russia | 51.55 | Q |
| 2 | 5 | 4 | Chad le Clos | South Africa | 51.88 | Q |
| 3 | 6 | 8 | László Cseh | Hungary | 51.89 | Q |
| 4 | 5 | 7 | Ivan Lenđer | Serbia | 51.95 | Q |
| 5 | 5 | 5 | Matteo Rivolta | Italy | 52.00 | Q |
| 6 | 4 | 6 | Yauhen Tsurkin | Belarus | 52.03 | Q, NR |
| 7 | 6 | 4 | Steffen Deibler | Germany | 52.07 | Q |
| 8 | 5 | 6 | Nikolay Skvortsov | Russia | 52.09 | Q |
| 9 | 5 | 3 | Konrad Czerniak | Poland | 52.12 | Q |
| 10 | 6 | 6 | Michael Rock | Great Britain | 52.13 | Q |
| 11 | 4 | 3 | Paweł Korzeniowski | Poland | 52.16 | Q |
| 12 | 5 | 0 | Thiago Pereira | Brazil | 52.23 | Q |
| 13 | 4 | 5 | Ryan Lochte | United States | 52.26 | Q |
| 14 | 6 | 5 | Eugene Godsoe | United States | 52.38 | Q |
| 15 | 5 | 2 | Takuro Fujii | Japan | 52.50 | Q |
| 16 | 6 | 7 | Philip Heintz | Germany | 52.52 | Q |
| 17 | 4 | 7 | Joseph Schooling | Singapore | 52.56 | |
| 18 | 5 | 8 | Francois Heersbrandt | Belgium | 52.75 | |
| 19 | 4 | 2 | Tommaso D'Orsogna | Australia | 52.82 | |
| 20 | 6 | 3 | Chris Wright | Australia | 52.83 | |
| 21 | 5 | 1 | Pavel Sankovich | Belarus | 52.87 | |
| 22 | 3 | 6 | Mario Todorović | Croatia | 52.92 | |
| 23 | 4 | 8 | Rafael Muñoz | Spain | 52.94 | |
| 24 | 6 | 2 | Bence Pulai | Hungary | 52.98 | |
| 25 | 6 | 1 | Yuki Kobori | Japan | 53.11 | |
| 25 | 6 | 0 | Mauricio Fiol | Peru | 53.11 | |
| 27 | 6 | 9 | Benjamin Hockin | Paraguay | 53.28 | |
| 28 | 3 | 5 | Alexandru Coci | Romania | 53.34 | |
| 29 | 3 | 3 | Coleman Allen | Canada | 53.53 | |
| 30 | 4 | 1 | Mehdy Metella | France | 53.77 | |
| 31 | 5 | 9 | Simao Morgado | Portugal | 53.83 | |
| 32 | 3 | 4 | Dominik Meichtry | Switzerland | 53.96 | |
| 33 | 3 | 2 | Tadas Duskinas | Lithuania | 53.97 | |
| 34 | 4 | 0 | Chang Gyu-Cheol | South Korea | 54.09 | |
| 35 | 3 | 7 | Yevgeniy Lazuka | Azerbaijan | 54.29 | |
| 36 | 3 | 1 | Liu Weijia | China | 54.37 | |
| 37 | 3 | 9 | Marwan Adel | Egypt | 54.39 | |
| 38 | 3 | 0 | Martin Zikmund | Czech Republic | 54.63 | |
| 39 | 2 | 7 | Ricardo Yee | Panama | 55.82 | |
| 40 | 2 | 1 | Jessie Lacuna | Philippines | 55.92 | |
| 41 | 2 | 6 | Joshua McLeod | Trinidad and Tobago | 56.06 | |
| 42 | 2 | 2 | Tyrone Alvarado | Ecuador | 56.27 | |
| 43 | 2 | 3 | Ifalemi Sau-Paea | Tonga | 56.32 | |
| 44 | 2 | 4 | Alexandre Bakhtiarov | Cyprus | 56.38 | |
| 45 | 3 | 8 | Yousef Al-Askari | Kuwait | 56.40 | |
| 46 | 1 | 6 | Anthony Ralefy | Madagascar | 56.48 | |
| 46 | 2 | 5 | Ayman Klzie | Syria | 56.48 | |
| 48 | 1 | 4 | Christopher Clark | French Polynesia | 56.50 | |
| 49 | 1 | 3 | Ralph Goveia | Zambia | 57.66 | |
| 50 | 2 | 0 | Sofyan El Gadi | Libya | 57.79 | |
| 51 | 2 | 8 | Afshin Asgari | Iran | 59.29 | |
| 52 | 2 | 9 | Ameer Ali | Iraq | 59.81 | |
| 53 | 1 | 2 | Oumar Toure | Mali | 59.86 | |
| 54 | 1 | 1 | Stanford Kawale | Papua New Guinea | 1:02.42 | |
| 55 | 1 | 7 | Kensuke Kimura | Northern Mariana Islands | 1:02.79 | |
| 56 | 1 | 9 | Sylla Alassane | Ivory Coast | 1:03.49 | |
| 57 | 1 | 8 | Haris Bandey | Pakistan | 1:06.03 | |
| | 1 | 0 | Abdulrahman Al-Ishaq | Qatar | | DNS |
| | 1 | 5 | Nuno Miguel Rola | Angola | | DNS |
| | 4 | 9 | Simon Sjödin | Sweden | | DNS |

### Semifinals

The semifinals were held at 19:04.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Chad le Clos | South Africa | 51.52 | Q |
| 2 | 3 | Yauhen Tsurkin | Belarus | 51.78 | Q, NR |
| 3 | 6 | Nikolay Skvortsov | Russia | 51.86 | |
| 4 | 1 | Eugene Godsoe | United States | 51.96 | |
| 5 | 5 | Ivan Lenđer | Serbia | 52.10 | |
| 6 | 8 | Philip Heintz | Germany | 52.37 | |
| 7 | 7 | Thiago Pereira | Brazil | 52.43 | |
| 8 | 2 | Michael Rock | Great Britain | 52.55 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | Ryan Lochte | United States | 51.48 | Q |
| 2 | 2 | Konrad Czerniak | Poland | 51.55 | Q |
| 3 | 4 | Yevgeny Korotyshkin | Russia | 51.60 | Q |
| 4 | 5 | László Cseh | Hungary | 51.61 | Q, NR |
| 5 | 3 | Matteo Rivolta | Italy | 51.64 | Q, NR |
| 6 | 6 | Steffen Deibler | Germany | 51.65 | Q |
| 7 | 7 | Paweł Korzeniowski | Poland | 51.85 | |
| 8 | 8 | Takuro Fujii | Japan | 52.27 | |

### Final

The final was held at 18:43.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 5 | Chad le Clos | South Africa | 51.06 | NR |
| | 2 | László Cseh | Hungary | 51.45 | NR |
| | 3 | Konrad Czerniak | Poland | 51.46 | |
| 4 | 1 | Steffen Deibler | Germany | 51.54 | |
| 5 | 6 | Yevgeny Korotyshkin | Russia | 51.57 | |
| 6 | 4 | Ryan Lochte | United States | 51.58 | |
| 7 | 7 | Matteo Rivolta | Italy | 51.65 | |
| 7 | 8 | Yauhen Tsurkin | Belarus | 51.65 | NR |