The men's 100 metre breaststroke competition at the 2023 World Aquatics Championships was held on 23 and 24 July 2023.

Records Prior to the competition, the existing world and championship records were as follows.

Results Heats The heats were started on 22 July at 12:26.

Rank Heat Lane Name Nationality Time Notes 1 7 4 Qin Haiyang Q, AS 2 7 5 Arno Kamminga Q 3 6 3 Lucas Matzerath Q, NR 4 6 4 Nicolò Martinenghi Q 5 5 4 Nic Fink Q 6 7 6 Josh Matheny Q 7 6 5 Federico Poggio Q 8 7 3 James Wilby Q 9 5 5 Yan Zibei Q 10 6 6 Andrius Šidlauskas Q 11 6 8 Denis Petrashov Q, NR 12 7 7 Choi Dong-yeol Q 13 5 3 Berkay Ömer Öğretir Q 14 6 7 João Gomes Júnior 1:00.12 Q 15 5 2 Bernhard Reitshammer 1:00.20 Q 16 5 6 Zac Stubblety-Cook 1:00.22 Q 17 7 2 Ippei Watanabe 1:00.28 18 6 2 Valentin Bayer 1:00.51 19 5 1 Darragh Greene 1:00.54 20 6 1 Matti Mattsson 1:00.62 21 5 8 Anton McKee 1:00.86 22 7 8 Dawid Wiekiera 1:00.89 23 4 5 Jérémy Desplanches 1:00.95 24 5 9 Maksym Ovchynnikov 1:01.01 25 5 7 Miguel de Lara 1:01.02 26 7 1 Erik Persson 1:01.03 27 5 0 Lyubomir Epitropov 1:01.16 28 7 0 James Dergousoff 1:01.19 29 6 0 Jorge Murillo 1:01.23 30 4 3 Michael Houlie 1:01.58 31 4 9 Peter Stevens 1:01.59 32 4 7 Gabriel Lopes 1:01.69 33 4 4 Joshua Gilbert 1:01.79 34 4 1 Amro Al-Wir 1:01.80 35 4 6 Ronan Wantenaar 1:01.91 36 3 2 Mariano Lazzerini 1:01.97 37 3 4 Jadon Wuilliez 1:02.10 NR 38 3 6 Chao Man Hou 1:02.19 39 4 8 Adam Chillingworth 1:02.43 40 4 2 Maximillian Wei Ang 1:02.45 41 1 8 Alexandre Grand'Pierre 1:02.65 NR 42 2 3 Tomas Peribonio 1:02.90 NR 43 4 0 Julio Horrego 1:03.04 44 3 5 Muhammad Dwiky Raharjo 1:03.18 45 2 4 Constantin Malachi 1:03.23 46 7 9 Phạm Thanh Bảo 1:03.37 47 2 2 Tasi Limtiaco 1:03.53 NR 48 3 1 Daniils Bobrovs 1:03.70 49 3 0 Adrian Robinson 1:03.79 50 3 9 Andres Martijena 1:03.80 51 2 5 Giacomo Casadei 1:04.31 52 3 7 Panayiotis Panaretos 1:04.38 53 3 8 Jonathan Raharvel 1:04.39 54 1 4 Ashot Chakhoyan 1:04.47 NR 55 2 6 Julio Calero Suarez 1:04.51 56 2 1 Luka Eradze 1:04.91 57 2 7 Luis Sebastian Weekes 1:05.15 58 2 8 Abdulaziz Al-Obaidly 1:05.24 59 2 0 Bransly Dirksz 1:05.38 60 2 9 Jonathan Chung Yee 1:06.05 NR 61 1 0 Abdulla Khalid Jamal 1:06.07 62 1 9 Osama Trabulsi 1:07.33 63 1 6 Micah Masei 1:08.42 64 1 5 Jayden Loran 1:08.47 65 1 3 Zach Moyo 1:10.10 66 1 7 Chadd Ng Chiu Ning Ning 1:10.80 67 1 1 Anthony Deleon Guerrero 1:12.66 68 1 2 Jion Hosei 1:17.05 3 3 Andrew Goh 6 9 Jaouad Syoud

Semifinals The semifinals were held on 23 July at 20:50.

Rank Heat Lane Name Nationality Time Notes 1 2 4 Qin Haiyang 57.82 Q, AS 2 2 5 Lucas Matzerath 58.75 Q 3 2 3 Nic Fink 58.88 Q 4 2 2 Yan Zibei 59.02 Q 5 1 4 Arno Kamminga 59.08 Q 6 1 3 Josh Matheny 59.20 Q 7 1 5 Nicolò Martinenghi 59.21 Q 8 2 1 Berkay Ömer Öğretir 59.50 Q 9 2 6 Federico Poggio 59.51 10 1 6 James Wilby 59.54 11 1 7 Choi Dong-yeol 59.59 NR 12 1 8 Zac Stubblety-Cook 59.69 13 2 7 Denis Petrashov 59.78 NR 14 1 2 Andrius Šidlauskas 59.95 15 1 1 João Gomes Júnior 16 2 8 Bernhard Reitshammer

Final The final was held on 24 July at 20:02.

Rank Lane Name Nationality Time Notes 4 Qin Haiyang 57.69 AS 1 Nicolò Martinenghi 58.72 2 Arno Kamminga 3 Nic Fink 5 5 Lucas Matzerath 58.88 6 6 Yan Zibei 59.23 7 7 Josh Matheny 59.45 8 8 Berkay Ömer Öğretir 59.79

References