The mixed 4 × 100 metre freestyle relay at the 2025 World Aquatics Championships was held on 2 August 2025 at the World Aquatics Championships Arena at the Singapore Sports Hub in Kallang, Singapore.
Background The United States, Australia, and China were expected to contest for the medals, given their sprint depth. The United States, using Jack Alexy, Patrick Sammon, Torri Huske, and Gretchen Walsh’s recent times, could reach 3:19.85, near their 2019 national record. Australia, who will likely field Kyle Chalmers, Flynn Southam, Mollie O’Callaghan, and Olivia Wunsch, projects around 3:21.21, while China, led by Pan Zhanle, Chen Juner, Wu Qingfeng, and Cheng Yujie, project to 3:22.39. Other possible finalists include Great Britain, Italy, the Neutral Athletes B team, and the Netherlands, though medal prospects depend heavily on relay composition and swimmers’ form earlier in the meet.
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 new records were set during this competition. Date Event Nation Time Record 2 August Final 3:18.48
Heats The heats took place at 11:09.
Rank Heat Lane Nation Swimmers Time Notes 1 2 4 Chris Guiliano (47.66)Johny Kulow (47.68)Simone Manuel (52.67) Kate Douglass (53.47) 3:21.48 Q 2 4 6 Rafael Fente-Damers (48.72)Yann Le Goff (48.01)Albane Cachot (53.93) Marie Wattel (53.55) 3:24.21 Q 3 2 2 Renzo Tjon-A-Joe (49.12)Sean Niewold (48.56)Tessa Giele (54.68) Marrit Steenbergen (51.95) 3:24.31 Q 4 2 8 Neutral Athletes B Vladislav Grinev (48.68)Ivan Giryov (47.77)Alina Gaifutdinova (53.67) Milana Stepanova (54.34) 3:24.46 Q 5 4 2 Sergio de Celis (48.52)Luca Hoek (47.60)María Daza (54.63) Carmen Weiler (53.73) 3:24.48 Q, NR 6 4 3 Manuel Frigo (48.47)Lorenzo Zazzeri (48.46)Chiara Tarantino (54.53) Emma Virginia Menicucci (53.38) 3:24.84 Q 7 4 5 Josha Salchow (48.32)Rafael Miroslaw (48.48)Nina Holt (53.62) Nina Jazy (54.45) 3:24.87 Q, NR 8 2 6 Ruslan Gaziev (48.69)Antoine Sauve (48.42)Brooklyn Douthwright (54.16) Mary-Sophie Harvey (53.67) 3:24.94 Q 9 4 4 Nándor Németh (48.25)Hubert Kós (48.82) Nikolett Pádár (54.42) Lilla Minna Ábrahám (53.47) 3:24.96 NR 10 2 7 Chen Juner (48.77) Wang Haoyu (48.10) Yu Yiting (53.72) Yang Wenwen (54.53) 3:25.12 11 2 3 Kai Taylor (48.37) Maximillian Giuliani (49.00) Hannah Casey (54.23) Milla Jansen (53.55) 3:25.15 12 3 5 Jacob Whittle (48.82) Jacob Mills (48.34) Freya Anderson (53.95) Eva Okaro (54.13) 3:25.24 13 3 3 Robin Hanson (48.84) Elias Persson (48.31) Louise Hansson (54.32) Sofia Åstedt (54.04) 3:26.41 14 1 6 Tatsuya Murasa (48.92) Taikan Tanaka (48.99) Nagisa Ikemoto (53.86) Mizuki Hirai (55.00) 3:26.77 15 3 6 Frederik Lentz (49.08) Oliver Søgaard-Andersen (48.44) Elisabeth Ebbesen (54.72) Schastine Tabor (55.50) 3:27.74 NR 16 4 0 Jorge Iga (49.32) Andrés Dupont (48.06) Miranda Grana (56.27) Celia Pulido (55.31) 3:28.96 17 3 4 Kamil Sieradzki (48.49) Karol Ostrowski (49.60) Zuzanna Famulok (55.69) Wiktoria Guść (55.48) 3:29.26 18 1 2 Dimitrios Markos (49.33) Konstantinos Stamou (48.84) Artemis Vasilaki (56.91) Nikoletta Pavlopoulou (56.46) 3:31.54 19 3 2 Matthew Sates (50.56) Matthew Caldwell (52.34) Olivia Nel (54.12) Aimee Canny (54.63) 3:31.65 20 1 7 Birnir Freyr Hálfdánarson (51.54)Guðmundur Leo Rafnsson (50.89)Snæfríður Jórunnardóttir (55.19)Jóhanna Elín Guðmundsdóttir (57.03) 3:34.65 NR 21 4 9 Mikel Schreuders (49.02)Patrick Groters (51.92)Avigayle Tromp (58.55)Elisabeth Timmer (57.17) 3:36.66 NR 22 4 1 Jesse Ssuubi Ssengonzi (51.99)Kirabo Namutebi (1:00.74)Gloria Muzito (55.70)Tendo Mukalazi (52.76) 3:41.19 23 3 8 Stephen Nyoike (53.61)Haniel Kudwoli (54.79)Imara Thorpe (58.36)Sara Mose (56.94) 3:43.70 24 2 9 Levon Kocharyan (53.09)Ashot Chakhoyan (54.31) Varsenik Manucharyan (58.54)Yeva Karapetyan (1:00.84) 3:46.78 25 3 9 Josué Domínguez (53.71)Elizabeth Jiménez (58.73)María Alejandra Fernández (1:02.80)Javier Núñez (51.58) 3:46.82 26 2 1 Chao Man Hou (52.33)Lam Chi Chong (54.17)Cheang Weng Chi (1:00.94)Chen Pui Lam (59.97) 3:47.41 27 2 5 Isak Brisenfeldt (51.94)Liggjas Joensen (52.90)Bjarta í Lágabø (1:02.86)Lea Højsted (1:01.18) 3:48.88 NR 28 1 3 Jose Tati (57.60)Jayla Pina (59.09)Kaila Dacruz (1:04.54)Rohan Shearer (52.47) 3:53.70 NR 29 1 5 Paige Schendelaar-Kemp (1:00.51)Johann Stickland (54.09)Kaiya Brown (1:04.39)Kokoro Frost (55.00) 3:53.99 30 1 4 Michael Miller (56.52)Piper Raho (1:02.97)Kouki Cerezo Watanabe (57.08)Maria Batallones (1:04.72) 4:01.29 31 2 0 Amna Thazkiyah Mirsaad (1:05.55)Meral Ayn Latheef (1:05.57)Mohamed Aan Hussain (54.49)Mohamed Rihan Shiham (58.60) 4:04.21 4 7 Hayden Kwan (52.14)Tsui Yik Ki (56.36)Li Sum Yiu Ng Lai Wa Disqualified 4 8 Josh Tarere (55.30)Nathaniel Noka (57.63)Jhnayali Tokome-GarapJoanna Chen 3 7 Did not start 3 0 3 1
Final The final took place on 2 August at 20:42.
Rank Lane Nation Swimmers Time Notes 4 Jack Alexy (46.91)Patrick Sammon (46.70)Kate Douglass (52.43)Torri Huske (52.44) 3:18.48 6 Neutral Athletes B Egor Kornev (47.69)Ivan Giryov (47.08)Daria Trofimova (52.42)Daria Klepikova (52.49) 3:19.68 ER 5 Maxime Grousset (47.62)Yann Le Goff (47.77)Marie Wattel (52.74)Béryl Gastaldello (53.22) 3:21.35 NR 4 7 Manuel Frigo (48.18)Carlos D'Ambrosio (47.34)Sara Curtis (52.40)Emma Virginia Menicucci (53.56) 3:21.48 NR 5 3 Sean Niewold (48.60)Renzo Tjon-A-Joe (47.87)Milou van Wijk (53.06)Marrit Steenbergen (52.18) 3:21.71 NR 6 8 Ruslan Gaziev (48.43)Josh Liendo (47.64)Mary-Sophie Harvey (53.46)Taylor Ruck (53.63) 3:23.16 7 2 Sergio de Celis (48.72)Luca Hoek (47.67)Carmen Weiler (53.82)María Daza (54.66) 3:24.87 8 1 Josha Salchow (48.49)Rafael Miroslaw (48.25 )Nina Holt (53.87)Nina Jazy (54.68) 3:25.29
Notes
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