The mixed 4 × 100 metre medley relay at the 2025 World Aquatics Championships was held on 30 July 2025 at the World Aquatics Championships Arena at the Singapore Sports Hub in Kallang, Singapore.
Background The United States, the Olympic champions and world record holders at 3:37.43, were expected to test different relay orders than normal due to the absence of Ryan Murphy and Nic Fink. Their fastest possible combination of individual swimmers based on their performances at the 2025 National Championships added up to 3:38.58. China, having swum 3:37.55 to win silver at the 2024 Olympics, were expected to rely on Xu Jiayu, Qin Haiyang, and Pan Zhanle. Australia faced breaststroke depth issues following injuries, with Nash Wilkes replacing Zac Stubblety-Cook. Other potential finalists included Canada, France, the Netherlands, Great Britain, Italy, and the Neutral Athletes B team.
Qualification Each National Federation could enter one team in the relay. The team had to be composed of swimmers who were also competing in the individual events, along with relay only swimmers who had to have met a specific qualifying time for the corresponding stroke and distance they would be swimming in the relay. Federations were only allowed to enter two relay-only swimmers for each relay they entered, though they could also enter relay-only swimmers from other relays which did not count toward this limitation.
Records Prior to the competition, the existing world and championship records were as follows.
The following record was established during the competition: Date Event Nation Swimmers Time Record 30 July Final Neutral Athletes B Miron Lifintsev (51.78)Kirill Prigoda (57.56)Daria Klepikova (55.97)Daria Trofimova (52.66) 3:37.97 CR
Heats The heats took place on 30 July at 11:36.
Rank Heat Lane Nation Swimmers Time Notes 1 4 7 Christian Bacico (52.68)Ludovico Viberti (58.67)Costanza Cocconcelli (57.71)Sara Curtis (53.13) 3:42.19 Q 2 3 3 Maaike de Waard (59.72)Caspar Corbeau (58.75)Nyls Korstanje (51.04)Milou van Wijk (53.05) 3:42.56 Q 3 3 4 Xu Jiayu (53.45)Dong Zhihao (58.74)Yu Yiting (57.16)Cheng Yujie (53.46) 3:42.81 Q 4 4 5 Hannah Fredericks (59.25)Nash Wilkes (59.76)Alexandria Perkins (56.80)Kai Taylor (47.30) 3:43.11 Q 5 4 3 Ingrid Wilm (59.34)Oliver Dawson (59.97)Joshua Liendo (49.85)Brooklyn Douthwright (54.31) 3:43.47 Q 6 3 6 Riku Matsuyama (53.95)Taku Taniguchii (59.46)Mizuki Hirai (56.58)Nagisa Ikemoto (53.58) 3:43.57 Q 7 2 9 Neutral Athletes B Miron Lifintsev (52.08)Danil Semianinov (59.67)Daria Klepikova (57.65)Aleksandra Kuznetsova (54.74) 3:44.14 Q 8 3 1 Ksawery Masiuk (53.31)Dominika Sztandera (1:06.20)Jakub Majerski (50.99)Katarzyna Wasick (53.72) 3:44.22 Q, NR 9 3 5 Mewen Tomac (53.08)Jérémie Delbois (59.80)Marie Wattel (57.50)Albane Cachot (53.93) 3:44.31 10 4 4 Keaton Jones (54.20)Campbell McKean (59.07)Torri Huske (58.47)Simone Manuel (52.76) 3:44.50 11 4 2 Vincent Passek (54.92)Lucas Matzerath (58.74)Angelina Köhler (57.12)Nina Holt (53.75) 3:44.53 12 4 6 Katie Shanahan (1:00.70)Max Morgan (59.83)Edward Mildred (51.50)Freya Anderson (54.16) 3:46.19 13 3 7 Hanna Rosvall (1:01.22)Erik Persson (1:00.35)Louise Hansson (57.22)Robin Hanson (48.12) 3:46.91 14 3 8 Estella Tonrath (1:01.11)Nil Cadevall (1:00.49)Arbidel González (52.73)María Daza (54.54) 3:48.87 15 2 6 Celia Pulido (1:00.97)Miguel de Lara (1:00.94)Miranda Grana (59.33)Andrés Dupont (48.10) 3:49.34 NR 16 4 1 Evangelos Makrygiannis (53.68)Savvas Thomoglou (1:00.73)Anna Ntountounaki (57.81)Artemis Vasilaki (57.25) 3:49.47 17 2 5 Ulises Saravia (54.41)Macarena Ceballos (1:06.87)Ulises Cazau (52.48)Andrea Berrino (57.60) 3:51.36 18 3 0 Pieter Coetze (53.01)Kaylene Corbett (1:08.05)Erin Gallagher (57.95)Matthew Caldwell (53.02) 3:52.03 19 4 9 Hayden Kwan (56.18)Adam Mak (1:00.69)Yeung Hoi Ching (1:01.08)Li Sum Yiu (54.92) 3:52.87 20 4 0 Guðmundur Leo Rafnsson (56.59)Einar Margeir Ágústsson (1:02.63)Jóhanna Elín Guðmundsdóttir (1:02.01)Snæfríður Jórunnardóttir (54.79) 3:56.02 21 3 9 Zackery Tay (57.38)Chan Chun Ho (1:02.29)Megan Yo (1:01.09)Quah Ting Wen (55.75) 3:56.51 22 1 4 Patrick Groters (56.97)Mikel Schreuders (1:02.15)Avigayle Tromp (1:03.57)Elisabeth Timmer (57.01) 3:59.70 NR 23 1 7 Elizabeth Jiménez (1:04.69)Josué Domínguez (1:03.01)Javier Núñez (54.97)María Alejandra Fernández (1:00.45) 4:03.12 24 1 2 Enkh-Amgalangiin Ariuntamir (1:07.99)Enkhtöriin Erkhes (1:04.17)Batbayaryn Enkhkhüslen (1:03.32)Batbayaryn Enkhtamir (50.13) 4:05.61 25 2 3 Kirabo Namutebi (1:09.52)Tendo Mukalazi (1:06.78)Jesse Ssuubi Ssengonzi (53.55)Gloria Muzito (55.80) 4:05.65 NR 26 1 3 Varsenik Manucharyan (1:08.36)Ashot Chakhoyan (1:03.52)Yeva Karapetyan (1:03.58)Levon Kocharyan (50.99) 4:06.45 NR 27 2 7 Imara Thorpe (1:07.27)Haniel Kudwoli (1:05.51)Stephen Nyoike (57.91)Sara Mose (57.03) 4:07.72 NR 28 1 1 Cheang Weng Chi (1:11.30)Chao Man Hou (1:02.63)Lam Chi Chong (57.17)Chen Pui Lam (59.18) 4:10.28 29 1 8 Bjarta í Lágabø (1:09.78)Lea Højsted (1:14.19)Isak Brisenfeldt (56.75)Liggjas Joensen (52.08) 4:12.80 30 2 4 Nubia Adjei (1:13.61)Harry Stacey (1:06.62)Abeiku Jackson (55.04)Joselle Mensah (58.50) 4:13.77 31 1 9 Kokoro Frost (1:02.06)Johann Stickland (1:11.49)Paige Schendelaar-Kemp (1:05.81)Kaiya Brown (1:04.86) 4:24.22 32 1 0 Francky Ramiakatrarivo (1:05.51)Jonathan Raharvel (1:03.96)Ony Andrianaivo (1:14.78)Antsa Rabejaona (1:02.52) 4:26.77 33 2 8 Piper Raho (1:11.72)Maria Batallones (1:16.53)Kouki Cerezo Watanabe (1:02.57)Michael Miller (57.06) 4:27.88 NR 34 2 0 Rohan Shearer (1:01.58)Jayla Pina (1:13.55)Kaila Dacruz (1:17.76)Jose Tati (59.27) 4:32.16 NR 35 1 5 Amna Thazkiyah Mirsaad (1:14.66)Mohamed Aan Hussain (1:15.63)Mohamed Rihan Shiham (1:04.42)Meral Ayn Latheef (1:05.52) 4:40.23 NR 36 2 2 Jhnayali Tokome-Garap (1:14.65)Joanna Chen (1:29.62)Nathaniel Noka (1:03.81)Josh Tarere (55.35) 4:43.43 37 1 6 Aragsan Mugabo (1:20.17)Kalisa Keza (1:44.39)Oscar Peyre Mitilla (55.14)Kevin Kaiga (1:08.80) 5:08.50 3 2 Anastasia Gorbenko (1:00.03)Gur Itzhaki (1:01.12)Arielle Hayon (59.21)Denis Loktev 2 1 4 8
Final The final was started at 20:47.
Rank Lane Nation Swimmers Time Notes 1 Neutral Athletes B Miron Lifintsev (51.78)Kirill Prigoda (57.56)Daria Klepikova (55.97)Daria Trofimova (52.66) 3:37.97 CR, NR 3 Xu Jiayu (53.23)Qin Haiyang (58.14)Zhang Yufei (55.96)Wu Qingfeng (52.66) 3:39.99 2 Kylie Masse (58.69)Oliver Dawson (59.63)Joshua Liendo (49.64)Taylor Ruck (52.94) 3:40.90 NR 4 5 Kai van Westering (54.03)Caspar Corbeau (58.74)Tessa Giele (56.29)Marrit Steenbergen (51.91) 3:40.97 NR 5 6 Kaylee McKeown (57.65)Nash Wilkes (59.98)Matthew Temple (50.26)Milla Jansen (53.13) 3:41.02 6 4 Christian Bacico (52.78)Nicolò Martinenghi (58.63)Costanza Cocconcelli (57.90)Sara Curtis (52.88) 3:42.19 7 7 Riku Matsuyama (54.01)Taku Taniguchii (59.48)Mizuki Hirai (56.78)Nagisa Ikemoto (53.88) 3:44.15 8 8 Ksawery Masiuk (53.19)Dominika Sztandera (1:06.53)Jakub Majerski (50.72)Katarzyna Wasick (53.83) 3:44.27
Notes
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