The mixed 4 × 100 metre freestyle relay event at the 2018 Summer Youth Olympics took place on 7 October at the Natatorium in Buenos Aires, Argentina.
Results Heats The heats were started at 11:27.Heats results Rank Heat Lane Name Nationality Time Notes 1 1 3 Lucas Peixoto (50.20)Ana Vieira (55.91)André Calvelo (49.64)Rafaela Raurich (55.17) 3:30.92Q 2 3 7 Denis Loktev (50.48)Gal Cohen Groumi (50.88)Anastasia Gorbenko (55.38)Lea Polonsky (56.83) 3:33.57 Q 3 3 4 Shen Jiahao (51.01)Hong Jinquan (50.61)Lin Xintong (56.58)Yang Junxuan (55.56) 3:33.76Q 4 3 3 Rafael Miroslaw (50.27)Luca Armbruster (51.41)Angelina Köhler (56.75)Julia Mrozinski (55.66) 3:34.09 Q 5 2 4 Ashton Brinkworth (50.36)Joseph Jackson (51.43)Michaela Ryan (56.18)Abbey Webb (56.51) 3:34.48 Q 6 1 4 Shinnosuke Ishikawa (52.09)Nagisa Ikemoto (54.52)Mayuka Yamamoto (55.39)Taku Taniguchi (53.95) 3:35.95 Q 7 1 5 Jakub Kraska (50.08)Jakub Majerski (50.19)Kornelia Fiedkiewicz (57.39)Karolina Jurczyk (59.03) 3:36.69 Q 8 2 3 Daniil Markov (50.28)Vladislav Gerasimenko (51.83)Daria Vaskina (57.20)Anastasia Makarova (57.67) 3:36.98 Q 9 3 6 Michael Pickett (50.77)Erika Fairweather (56.53)Gina Galloway (58.90)Zac Reid (51.32) 3:37.52 10 3 5 Antonio Djakovic (50.77)Noè Ponti (50.85)Leoni Richter (57.30)Elena Onieva Henrich (59.56) 3:38.48 11 2 7 Joshua Liendo (52.23)Finlay Knox (52.61)Kyla Leibel (55.08)Nina Kucheran (59.37) 3:39.29 12 3 1 Ong Jung Yi (53.41)Maximillian Ang (53.03)Gan Ching Hwee (58.59)Christie Chue (56.44) 3:41.47 13 3 8 Gabriel Nortje (51.60)Hendrik Duvenhage (53.13)Duné Coetzee (57.95)Kate Beavon (59.28) 3:41.96 14 2 6 Tinky Ho (57.75)Marcus Mok (53.37)Nicholas Lim (52.37)Natalie Kan (58.60) 3:42.09 15 3 2 Joaquín González (53.37)Juan Méndez (54.51)Julieta Lema (55.82)Delfina Dini (59.18) 3:42.88 16 1 6 Park Jung-hun (52.60)Lee Yoo-yeon (49.71)Wang Hee-song (1:00.35)Yun Eun-sol (1:00.23) 3:42.89 17 2 1 Marcos Gil (53.36)Ferran Julià (53.23)Tamara Frías (57.83)Andrea Galisteo (58.73) 3:43.15 18 2 8 Will Barao (52.95)Ethan Dang (52.84)Maddie Donohoe (58.72)Kate Douglass (59.17) 3:43.68 19 2 2 Andrés Puente (54.80)Taydé Sansores (59.78)Miriam Guevara (1:00.67)Guillermo Cruz (50.68) 3:45.93 20 2 5 Martín Valdivieso (55.31)Inés Marín (59.21)Trinidad Ardiles (1:03.77)Benjamin Schnapp (53.27) 3:51.56
Final The final was held at 18:51.Final results Rank Lane Name Nationality Time Notes 8 Kliment Kolesnikov (48.17)Andrei Minakov (49.60)Polina Egorova (55.71)Elizaveta Klevanovich (55.02) 3:28.50 4 Lucas Peixoto (50.30)Ana Vieira (55.93)André Calvelo (48.66)Rafaela Raurich (55.24) 3:30.13 3 Shen Jiahao (50.83)Hong Jinquan (50.46)Lin Xintong (55.44)Yang Junxuan (53.72) 3:30.45 4 6 Rafael Miroslaw (50.49)Luca Armbruster (51.21)Angelina Köhler (56.09)Julia Mrozinski (55.24) 3:33.03 5 1 Jakub Kraska (49.12)Jakub Majerski (50.23)Kornelia Fiedkiewicz (57.03)Aleksandra Knop (56.70) 3:33.08 6 2 Ashton Brinkworth (50.61)Joseph Jackson (51.56)Michaela Ryan (56.14)Abbey Webb (55.72) 3:34.03 7 7 Keisuke Yoshida (51.34)Taku Taniguchi (52.67)Mayuka Yamamoto (55.53)Nagisa Ikemoto (54.64) 3:34.18 5 Denis Loktev (50.56)Gal Cohen Groumi (50.41)Lea Polonsky (57.03)Anastasia Gorbenko
References