The men's 100 metre freestyle event at the 2024 World Aquatics Swimming Championships (25 m) was held from 11 to 12 December 2024 at the Duna Arena in Budapest, Hungary.

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

The following records were established during the competition: Date Round Name Nationality Time Record 10 December Final*Jack Alexy 45.05 CR 11 December Heat 9Jordan Crooks 44.95 CR * Split from the men's 4 × 100 m freestyle relay

Background Several of the top contenders in the event chose not to compete, including Kyle Chalmers, David Popovici, Pan Zhanle, Thomas Ceccon, Hwang Sun-woo, and Tom Dean. Maxime Grousset of France held the fastest personal best in the field with a 45.41, set at the 2022 Short Course World Championships. Italy’s Alessandro Miressi had the second fastest personal best, having clocked a 45.51 en route to silver at the 2023 European Short Course Championships. Brazil’s Guilherme Caribé recorded a lifetime best of 45.78 in August 2024, while Egor Kornev, who was recently approved to compete as a neutral athlete, posted a 45.97 at the Russian Short Course Championships in November. Jordan Crooks of the Cayman Islands made the final in this event at the previous World Championships, setting a personal best of 45.55 in the semifinal. Olympic finalists in the field included Hungary’s Nándor Németh, and Americans Jack Alexy and Chris Guiliano, though only Nemeth had a prior short-course time. Dylan Carter of Trinidad and Tobago and Leonardo Deplano of Italy each entered with a best time of 46.36.

SwimSwam predicted Maxime Grousset would win, followed by Jordan Crooks in second and Guilherme Caribé in third.

Results Heats The heats were started on 11 December at 09:23. Rank Heat Lane Name Nationality Time Notes198 Jordan Crooks 44.95Q, CR, AM2101 Chris Guiliano 45.94Q3114 Maxime Grousset 46.01Q494 Guilherme Caribé 46.06Q5115 Egor Kornev Neutral Athletes B46.07Q6112 Shane Ryan 46.23Q, NR781 Youssef Ramadan 46.24Q, NR892 Heiko Gigler 46.45Q, NR9107 Jack Alexy 46.57Q1090 Jere Hribar 46.60Q=1186 Tomas Navikonis 46.63Q=11113 Dylan Carter 46.63Q, 1397 Rafael Miroslaw 46.74Q14104 Alessandro Miressi 46.82Q=1588 Lamar Taylor 46.89Q, NR=1599 Kamil Sieradzki 46.89Q1795 Leonardo Deplano 46.98R18105 Nándor Németh 47.00R19118 Patrick Dinu 47.052079 Tomas Koski 47.13 NR2189 Robin Hanson 47.182293 Marco Antonio Ferreira 47.1923103 Dmitrii Zhavoronkov Neutral Athletes B47.22=2496 Wudi Liu 47.24=24100 Yuri Kisil 47.2426117 Harrison Turner 47.31=2791 Sergio de Celis 47.47=27109 Mikel Schreuders 47.4729119 Luis Domínguez 47.6430116 Kaiya Seki 47.673170 Deniel Nankov 47.7132108 Matej Duša 47.843384 Bjørnar Grytnes Laskerud 47.853464 Simon Doueihy 47.91 NR35106 Edward Sommerville 47.9636110 Velimir Stjepanović 47.993783 Luong Jérémie Loïc Nino 48.11 NR3874 Adilbek Mussin 48.173963 Martin Kartavi 48.214078 Roman Mityukov 48.2741111 Emre Gürdenli 48.28=4254 Diego Aranda 48.44 NR=4277 Konstantinos Englezakis 48.444455 Marwane Sebbata 48.48 NR4562 Yin Chuen Lim 48.49 NR4687 Ardi Azman 48.57=4771 Lars Kuljus 48.66=4780 Daniel Gracík 48.664972 Rafael Ponce 48.81 NR5068 Samyar Abdoli 48.895160 Gabriel Martinez 48.915261 Javier Núñez 49.03 NR5373 Adi Mešetović 49.055482 Pongpanod Trithan 49.105585 Hugo Wrathall 49.3956102 Ruard Van Renen 49.435715 William Birkett Feraud 49.525875 Enkhtamir Batbayar 49.715976 Luka Kukhalashvili 49.736042 Miguel Vasquez 49.796166 Grisi Koxhaku 49.896265 Adrian Vargas 49.91 NR6359 Colins Obi Ebingha 49.96 NR6446 Jovan Jankovski 50.306557 Musa Zhalayev 50.37 NR6652 Stefano Mitchell 50.38=6750 Aryaan Din 50.47 NR=6751 Hansel Mccaig 50.476944 Hector Langkilde 50.737043 Nixon Hernández 50.777145 Mohamad Zubaid 51.097241 Collins Saliboko 51.107369 Tendo Mukalazi 51.207453 Alaa Maso 51.337534 Israel Poppe 51.367614 Ismael Jair Holtuin 51.387712 Adnan Al-Abdallat 51.467835 Belly-Cresus Ganira 51.497947 Antoine De Lapparent 51.52 NR8040 Mohammed Jibali 51.558149 Finau Ohuafi 52.168232 Mohame Aan Hussain 52.29 NR8330 Joel Ling 52.418431 Mohammed Hani S Al Zaki 52.54 NR8548 Amos Ferley 52.758633 Rony Daher 53.038758 Sidrell Williams 53.158813 Kenale Alleyne 53.218936 Ardasher Gadoev 55.069024 Yousif Ibrahim 55.40 NR9138 Baritiana Andriampenomanana 55.699237 Sangay Tenzin 55.739339 Cedrick Niyibizi 56.389426 Houmed Houssein Barkat 56.77 NR9522 Christian Chang-Chipolina 58.129625 Asher Banda 58.329723 Elhadj N'Gnane Diallo 58.719816 Phixaiyadeth Thirakul 1:00.839927 Ousman Jobe 1:04.0310021 Jolanio Guterres 1:04.39 NR10111 Jaya Corder 1:05.5017Thabo MotsopaDid not start20M. Mamane Hamissou Abba28Pedro Rogery56Matthew Abeysinghe67Ian Ho

Semifinals The semifinals were started on 11 December at 17:58. Rank Heat Lane Name Nationality Time Notes124 Jordan Crooks 45.22Q222 Jack Alexy 45.29Q323 Egor Kornev Neutral Athletes B45.52Q425 Maxime Grousset 45.59Q521 Alessandro Miressi 45.69Q615 Guilherme Caribé 45.86Q714 Chris Guiliano 46.08Q827 Tomas Navikonis 46.09Q, NR912 Jere Hribar 46.18R1013 Shane Ryan 46.24R1118 Leonardo Deplano 46.291217 Rafael Miroslaw 46.331311 Lamar Taylor 46.34 NR1426 Youssef Ramadan 46.411528 Kamil Sieradzki 46.431616 Heiko Gigler 46.46

Final The final was held on 12 December at 17:40.

Rank Lane Name Nationality Time Notes 5 Jack Alexy 45.38 7 Guilherme Caribé 45.47 SA 4 Jordan Crooks 45.48 4 1 Chris Guiliano 45.51 5 3 Egor Kornev Neutral Athletes B 45.58 6 6 Maxime Grousset 45.78 7 2 Alessandro Miressi 45.93 8 8 Tomas Navikonis 46.25

References