# 2010 FINA World Swimming Championships (25 m) – Men's 4 × 100 metre medley relay

The Men's 4×100 Medley Relay at the 10th FINA World Swimming Championships (25m) was swum on 19 December 2010 in Dubai, United Arab Emirates. 21 nations swam in the Preliminary heats in the morning, from which the top-8 finishers advanced to the Final that evening.
At the start of the event, the existing World (WR) and Championship records (CR) were as follows.
| Record | Time | Nation | Swimmers | Location | Date |
| WR | 3:19.16 | Russia | Stanislav Donets (49.63) Sergey Geybel (56.43) Yevgeny Korotyshkin (48.35) Danila Izotov (44.75) | Saint Petersburg, Russia | 20 December 2009 |
| CR | 3:24.29 | Russia | Stanislav Donets (50.57) Sergey Geybel (57.93) Evgeny Korotyshkin (49.39) Alexander Sukhorukov (46.40) | Manchester | 13 April 2008 |
The following records were established during the competition:
| Event | Round | Nation | Swimmer(s) | Time | WR | CR |
| 4x100 Medley Relay | Final | United States | Nick Thoman (49.88) Mihail Alexandrov (56.52) Ryan Lochte (49.17) Garrett Weber-Gale (45.42) | 3:20.99 | | CR |
| 100 Backstroke | Final | Russia | Stanislav Donets | 48.95 | | CR |

## Results
### Heats

| Rank | Heat | Lane | Nation | Name | Time | Notes |
| 1 | 3 | 4 | Russia | Stanislav Donets (49.56) Stanislav Lakhtyukhov (58.41) Nikita Konovalov (50.39) Sergey Fesikov (46.35) | 3:24.71 | Q |
| 2 | 2 | 4 | United States | David Plummer (50.95) Mark Gangloff (58.14) Tyler McGill (50.45) Josh Schneider (47.15) | 3:26.69 | Q |
| 3 | 1 | 6 | Germany | Stefan Herbst (46.35) Hendrik Feldwehr (58.50) Benjamin Starke (50.25) Steffen Deibler (46.14) | 3:26.91 | Q |
| 4 | 1 | 7 | France | Jérémy Stravius (51.02) Hugues Duboscq (58.21) Clément Lefert (51.81) Yannick Agnel (46.12) | 3:27.16 | Q |
| 5 | 1 | 5 | Japan | Masafumi Yamaguchi (52.07) Naoya Tomita (58.15) Masayuki Kishida (50.30) Takuro Fujii (46.80) | 3:27.32 | Q |
| 6 | 1 | 4 | Australia | Benjamin Treffers (51.59) Brenton Rickard (58.23) Chris Wright (51.38) Tommaso D'Orsogna (46.57) | 3:27.77 | Q |
| 7 | 3 | 5 | Brazil | Guilherme Guido (51.63) Henrique Barbosa (58.28) Glauber Silva (51.61) Nicolas Oliveira (47.08) | 3:28.60 | Q |
| 8 | 3 | 7 | China | Cheng Feiyi (51.85) Wang Shuai (58.22) Chen Weiwu (51.31) Lü Zhiwu (47.71) | 3:29.09 | Q |
| 9 | 1 | 3 | Canada | Jake Tapp (51.31) Paul Kornfeld (58.57) Joe Bartoch (51.70) Richard Hortness (48.34) | 3:29.92 | |
| 10 | 3 | 1 | Italy | Mirco di Tora (51.64) Edoardo Giorgetti (59.39) Paolo Facchinelli (52.07) Marco Orsi (47.24) | 3:30.34 | |
| 11 | 2 | 5 | Sweden | Kristian Kron (54.19) Jakob Dorch (59.10) Lars Frölander (50.46) Mattias Carlsson (48.87) | 3:32.62 | |
| 12 | 2 | 3 | Kazakhstan | Oleg Rabota (56.33) Vladislav Polyakov (57.64) Rustam Khudiyev (51.36) Artur Dilman (48.76) | 3:34.09 | |
| 13 | 2 | 7 | Estonia | Andres Olvik (53.59) Filipp Provorkov (59.33) Martti Aljand (53.13) Vladimir Sidorkin (48.41) | 3:34.46 | NR |
| 14 | 3 | 3 | Colombia | Omar Pinzón (53.12) Jorge Murillo (1:01.04) Julio Galofre (53.51) Juan Cambindo (49.68) | 3:37.35 | NR |
| 15 | 1 | 1 | Norway | Lavrans Solli (54.28) Sverre Naess (1:01.94) Alexander Broverg Skeltved (54.11) Thomas Ole Fadnes (48.61) | 3:38.94 | |
| 16 | 2 | 6 | Chinese Taipei | Lin Yu-An (55.40) Chen Cho-Yi (1:03.70) Hsu Chi-Chieh (52.92) Yuan Ping (50.48) | 3:42.50 | |
| 17 | 2 | 1 | Malta | Mark Sammut (59.39) Andrea Agius (1:04.36) Neil Agius (57.22) Andrew Chetcuti (50.10) | 3:51.07 | |
| 18 | 2 | 2 | United Arab Emirates | Al Ghaferi Mohammed (58.04) Mubarak Al Besher (1:03.56) Bakheet Al Jasmi (57.98) Obaid Al Jasmi (52.25) | 3:51.83 | |
| 19 | 1 | 2 | Macau | Tong Antonio (57.39) Chou Kit (1:07.78) Lao Kuan Fong (56.85) Ngou Pok Man (56.07) | 3:58.09 | |
| - | 3 | 2 | Kenya | | DNS | |
| - | 3 | 6 | Venezuela | | DNS | |

### Final

| Rank | Lane | Nation | Name | Time | Time behind | Notes |
| | 5 | United States | Nick Thoman (49.88) Mihail Alexandrov (56.52) Ryan Lochte (49.17) Garrett Weber-Gale (45.42) | 3:20.99 | | CR |
| | 4 | Russia | Stanislav Donets (48.95) CR Stanislav Lakhtyukhov (57.27) Evgeny Korotyshkin (49.39) Nikita Lobintsev (46.00) | 3:21.61 | 0.62 | |
| | 1 | Brazil | Guilherme Guido (50.69) Felipe França Silva (57.21) Kaio de Almeida (50.09) César Cielo (45.13) | 3:23.12 | 2.13 | SA |
| 4 | 6 | France | Camille Lacourt (50.23) Hugues Duboscq (57.51) Frédérick Bousquet (50.92) Fabien Gilot (44.94) | 3:23.60 | 2.61 | |
| 5 | 7 | Australia | Benjamin Treffers (51.43) Brenton Rickard (56.59) Geoff Huegill (50.46) Matthew Abood (45.98) | 3:24.46 | 3.47 | |
| 6 | 2 | Japan | Ryosuke Irie (50.88) Naoya Tomita (57.49) Masayuki Kishida (50.29) Takuro Fujii (47.01) | 3:25.67 | 4.68 | |
| 7 | 3 | Germany | Stefan Herbst (51.92) Hendrik Feldwehr (57.45) Benjamin Starke (50.38) Steffen Deibler (46.30) | 3:26.05 | 4.68 | |
| 8 | 8 | China | Cheng Feiyi (51.52) Wang Shuai (57.87) Chen Weiwu (50.86) Lü Zhiwu (47.22) | 3:27.47 | 6.48 | |
The USA won the event in a Championship Record 3:20.99, ahead of Russia at 3:21.61. Stanislav Donets lead-off the Russia relay with a 48.95, a new Championship Record for the 100 backstroke and within one-hundredth-of-a-second of the World Record. At the 100, Russia was in first place with the USA second. On the second leg (breaststroke), the USA's Alexandrov swam a 56.52, which caught-up the Russia's Lakhtyukhov, so that at the 200, the USA trailed Russia 1:46.40 to 1:46.22. During the third leg (butterfly), the USA's Lochte pulled ahead of Russia's Korotyshkin, giving the USA a slim lead over Russia, 2:35.57 to 2:35.61. For the final leg (freestyle), the USA extended its lead.