2010 FINA World Swimming Championships (25 m) – Men's 100 metre individual medley
# 2010 FINA World Swimming Championships (25 m) – Men's 100 metre individual medley

The Men's 100 Individual Medley (or "I.M.") at the 10th FINA World Swimming Championships (25m) was swum 18–19 December 2010 in Dubai, United Arab Emirates. On 18 December, 83 individuals swam in the Preliminary heats in the morning, with the top-16 finishers advancing to the Semifinals that evening. The top-8 finishers from Semifinals then advanced to the Final the next evening.

At the start of the event, the existing World (WR) and Championship records (CR) were:

| | Name | Nation | Time | Location | Date |
| - | - | - | - | - | - |
| WR | Peter Mankoč | Slovenia | 50.76 | Istanbul | 12 December 2009 |
| CR | Ryan Lochte | United States | 51.15 | Manchester | 13 April 2008 |

The following records were established during the competition:

| Date | Round | Name | Nation | Time | WR | CR |
| - | - | - | - | - | - | - |
| 18 December 2010 | Semifinals | Ryan Lochte | United States | 50.81 | | CR |

## Results

### Heats

| Rank | Heat | Lane | Name | Time | Notes |
| - | - | - | - | - | - |
| 1 | 2 | 3 | Ryan Lochte (USA) | 52.06 | Q |
| 2 | 11 | 3 | Henrique Rodrigues (BRA) | 52.53 | Q |
| 3 | 11 | 7 | George Bovell (TRI) | 52.60 | Q |
| 4 | 11 | 5 | Kenneth To (AUS) | 52.75 | Q |
| 5 | 11 | 4 | Peter Mankoc (SLO) | 52.78 | Q |
| 6 | 9 | 4 | Markus Deibler (GER) | 52.83 | Q |
| 7 | 10 | 4 | Sergey Fesikov (RUS) | 53.03 | Q |
| 8 | 7 | 5 | Shaune Fraser (CAY) | 53.05 | Q |
| 9 | 10 | 5 | Takuro Fujii (JPN) | 53.12 | Q |
| 10 | 10 | 3 | Tommaso D'Orsogna (AUS) | 53.16 | Q |
| 11 | 1 | 4 | John Tapp (CAN) | 53.43 | Q, NR |
| 12 | 11 | 6 | Bradley Ally (BAR) | 53.62 | Q |
| 13 | 2 | 8 | Sun Xiaolei (CHN) | 53.70 | Q |
| 14 | 11 | 8 | Omar Pinzón (COL) | 53.74 | Q |
| 15 | 3 | 2 | Tyler Clary (USA) | 53.94 | Q |
| 16 | 9 | 5 | Christian Galenda (ITA) | 54.02 | Q |
| 17 | 10 | 6 | Martti Aljand (EST) | 54.03 | |
| 18 | 2 | 6 | Gal Nevo (ISR) | 54.20 | |
| 19 | 9 | 3 | Vytaunas Janusaitis (LTU) | 54.24 | |
| 19 | 10 | 2 | Andrejs Dūda (LAT) | 54.24 | |
| 21 | 9 | 8 | Graeme John Moore (RSA) | 54.27 | |
| 22 | 9 | 7 | Martin Spitzer (AUT) | 54.33 | |
| 23 | 9 | 6 | Diogo Carvalho (POR) | 54.41 | |
| 24 | 10 | 7 | Dominik Straga (CRO) | 54.42 | |
| 25 | 10 | 8 | Diogo Yabe (BRA) | 54.60 | |
| 26 | 8 | 5 | Taki Mrabet (TUN) | 54.86 | |
| 27 | 11 | 2 | Sverre Naess (NOR) | 54.89 | |
| 28 | 8 | 3 | Serkan Atasay (TUR) | 55.02 | |
| 29 | 8 | 2 | Aleksey Derlyugov (UZB) | 55.09 | |
| 30 | 7 | 6 | Robert Žbogar (SLO) | 55.32 | |
| 31 | 8 | 4 | Raphaël Stacchiotti (LUX) | 55.45 | |
| 32 | 10 | 1 | Tomáš Klobučník (SVK) | 55.89 | |
| 33 | 3 | 7 | Daniel Coakley (PHI) | 56.08 | |
| 34 | 3 | 6 | Chen Zuo (CHN) | 56.85 | |
| 35 | 7 | 4 | Serghei Golban (MDA) | 57.27 | |
| 35 | 8 | 7 | Saeed Malekae Ashtiani (IRI) | 57.27 | |
| 37 | 7 | 2 | Juan David Molina (COL) | 57.44 | |
| 38 | 6 | 6 | Nicholas James (ZIM) | 57.47 | |
| 39 | 2 | 4 | Marawan Hellal (EGY) | 57.52 | |
| 40 | 7 | 3 | Amine Kouame (MAR) | 57.59 | |
| 41 | 3 | 5 | Leopoldo Andara (VEN) | 57.69 | |
| 42 | 8 | 6 | Ensar Hajder (BIH) | 57.70 | |
| 43 | 8 | 1 | Gustavo Paschetta (ARG) | 57.80 | |
| 44 | 6 | 4 | Jean Luis Apolinar Gómez Nuñez (DOM) | 58.24 | |
| 45 | 7 | 1 | Obaid Al-Jasmi (UAE) | 58.43 | |
| 46 | 2 | 7 | Rehan Jehangir Poncha (IND) | 58.46 | |
| 47 | 6 | 2 | Yousef Alaskari (KUW) | 58.61 | |
| 48 | 7 | 7 | Pedro Miguel Pinotes (ANG) | 58.79 | |
| 49 | 2 | 5 | Lao Kuan Fong (MAC) | 58.80 | |
| 50 | 7 | 8 | Quinton Delie (NAM) | 58.94 | |
| 51 | 6 | 8 | Lim Duan Le Kenneth (SIN) | 59.18 | |
| 52 | 6 | 5 | Giorgi Mtvralashvili (GEO) | 59.21 | |
| 53 | 5 | 7 | Jourdy Martis (AHO) | 59.22 | |
| 54 | 6 | 7 | Andrea Agius (MLT) | 59.38 | |
| 55 | 5 | 1 | Arturo Alejandro Montilla (DOM) | 59.50 | |
| 56 | 5 | 3 | Hycinth Cijntje (AHO) | 59.61 | |
| 57 | 5 | 5 | Hazem Abdulwahid Tashkandi (KSA) | 1:00.06 | |
| 58 | 5 | 6 | Neil Agius (MLT) | 1:00.20 | |
| 59 | 6 | 1 | Tong Antonio (MAC) | 1:00.29 | |
| 60 | 4 | 1 | Yellow Yeiyah (NGR) | 1:01.11 | |
| 61 | 5 | 2 | Colin Bensadon (GIB) | 1:01.18 | |
| 62 | 5 | 8 | Sofyan El Gadi (LBA) | 1:03.13 | |
| 63 | 4 | 5 | Dulguun Batsaikhan (MGL) | 1:03.57 | |
| 64 | 4 | 6 | Julien Brice (LCA) | 1:04.61 | |
| 65 | 4 | 7 | Hamdan Iqbal Bayusuf (KEN) | 1:04.65 | |
| 66 | 4 | 3 | Joshua Runako Daniel (LCA) | 1:05.32 | |
| 67 | 4 | 4 | Nisar Ahmed (PAK) | 1:05.61 | |
| 68 | 4 | 8 | Lim Jyh Jye (BRU) | 1:06.06 | |
| 69 | 3 | 3 | Kouassi Franck Olivier Brou (CIV) | 1:07.16 | |
| 70 | 2 | 1 | Ronaldo Rodrigues (GUY) | 1:07.76 | |
| 71 | 2 | 2 | Tepaia Payne (COK) | 1:08.10 | |
| 72 | 3 | 4 | Shailesh Shumsher Rana (NEP) | 1:09.20 | |
| 73 | 5 | 4 | Tano Pierre Claver Atta (CIV) | 1:10.22 | |
| 74 | 3 | 8 | Inayath Hassan (MDV) | 1:10.90 | |
| 75 | 3 | 1 | Giordan Harris (MHL) | 1:13.77 | |
| 76 | 4 | 2 | Elio Berberi (ALB) | 1:13.84 | |
| – | 1 | 3 | Martin Tomasin (BOL) | DNS | |
| – | 6 | 3 | Loai Abdulwahid Tashkandi (KSA) | DNS | |
| – | 9 | 1 | Simon Sjödin (SWE) | DNS | |
| – | 1 | 5 | Godonou Wilfrid Tevoedjre (BEN) | DSQ | |
| – | 8 | 8 | Dmitriy Shvetsov (UZB) | DSQ | |
| – | 9 | 2 | Tomáš Fucík (CZE) | DSQ | |
| – | 11 | 1 | Federico Turrini (ITA) | DSQ | |

### Semifinals

Semifinal 1

| Rank | Lane | Name | Time | Notes |
| - | - | - | - | - |
| 1 | 3 | Markus Deibler (GER) | 52.08 | Q |
| 2 | 5 | Kenneth To (AUS) | 52.16 | Q |
| 3 | 4 | Henrique Rodrigues (BRA) | 52.70 | Q |
| 4 | 2 | Tommaso D'Orsogna (AUS) | 52.85 | |
| 5 | 6 | Shaune Fraser (CAY) | 52.94 | |
| 6 | 7 | Bradley Ally (BAR) | 53.12 | |
| 7 | 1 | Omar Pinzón (COL) | 53.44 | |
| 8 | 8 | Christian Galenda (ITA) | 53.65 | |

Semifinal 2

| Rank | Lane | Name | Time | Notes |
| - | - | - | - | - |
| 1 | 4 | Ryan Lochte (USA) | 50.81 | Q, CR |
| 2 | 5 | George Bovell (TRI) | 52.23 | Q |
| 3 | 2 | Takuro Fujii (JPN) | 52.43 | Q |
| 4 | 6 | Sergey Fesikov (RUS) | 52.51 | Q |
| 5 | 7 | John Tapp (CAN) | 52.62 | Q, NR |
| 6 | 3 | Peter Mankoc (SLO) | 52.80 | |
| 7 | 1 | Sun Xiaolei (CHN) | 53.12 | |
| 8 | 8 | Tyler Clary (USA) | 53.99 | |

### Final

| Rank | Lane | Name | Time |
| - | - | - | - |
| | 4 | Ryan Lochte (USA) | 50.86 |
| | 5 | Markus Deibler (GER) | 51.69 |
| | 7 | Sergey Fesikov (RUS) | 51.81 |
| 4 | 6 | George Bovell (TRI) | 51.97 |
| 5 | 3 | Kenneth To (AUS) | 52.20 |
| 6 | 2 | Takuro Fujii (JPN) | 52.36 |
| 7 | 1 | John Tapp (CAN) | 52.97 |
| 8 | 8 | Henrique Rodrigues (BRA) | 53.69 |
