Swimming at the 2025 World Aquatics Championships – Men's 400 metre freestyle

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Men's 400 metre freestyle
at the 2025 World Aquatics Championships
Venue World Aquatics Championships Arena
Location Singapore Sports Hub, Kallang
Dates27 July
Competitors43 from 36 nations
Winning time3:42.35
Medalists
Gold medal icon.svg   Flag of Germany.svg  Germany
Silver medal icon.svg   Flag of Australia (converted).svg  Australia
Bronze medal icon.svg   Flag of South Korea.svg  South Korea
  2024
2027  

The men's 400 metre freestyle event at the 2025 World Aquatics Championships was held on 27 July 2025 at the World Aquatics Championships Arena at the Singapore Sports Hub in Kallang, Singapore. [1] [2]

Contents

Background

Seven of the eight 2024 Paris Olympic finalists were entered into the event. Germany’s Lukas Märtens, fresh from breaking the long-standing 400 freestyle world record in 3:39.96 earlier in the year, was entering as the clear favourite, seeking his first long-course world title in the event. He was joined by Australia’s Elijah Winnington, the 2022 world champion and a 3:41.22 performer, and South Korea’s Kim Woo-min, the 2024 world champion. Australia’s Samuel Short, the 2023 world champion with a 3:40.68 lifetime best, and Brazil’s Guilherme Costa, who broke the Americas record with 3:42.76 in Paris, were also in contention. Newer challengers included American Rex Maurer, ranked third in 2025 with 3:43.33, and Hungary’s Kristóf Rasovszky. [3]

Qualification

Each National Federation was permitted to enter a maximum of two qualified athletes in each individual event, but they could do so only if both of them had attained the "A" standard qualification time. For this event, the "A" standard qualification time was 3:48.15. Federations could enter one athlete into the event if they met the "B" standard qualification time. For this event, the "B" standard qualification time was 3:56.14. Athletes could also enter the event if they had met an "A" or "B" standard in a different event and their Federation had not entered anyone else. Additional considerations applied to Federations who had few swimmers enter through the standard qualification times. Federations in this category could at least enter two men and two women to the competition, all of whom could enter into up to two events. [4] [5]

Top 10 fastest qualification times [6]
SwimmerCountryTimeCompetition
Lukas Märtens Flag of Germany.svg  Germany 3:39.962025 Malmsten Swim Open Stockholm
Samuel Short Flag of Australia (converted).svg  Australia 3:41.032025 Australian Trials
Elijah Winnington Flag of Australia (converted).svg  Australia 3:41.412024 Australian Championships
Kim Woo-min Flag of South Korea.svg  South Korea 3:42.422024 Mare Nostrum Tour (Monaco)
Guilherme Costa Flag of Brazil.svg  Brazil 3:42.76 2024 Summer Olympics
Oliver Klemet Flag of Germany.svg  Germany 3:42.812024 Gothaer & friends meet
Felix Auböck Flag of Austria.svg  Austria 3:43.24 2024 European Championships
Rex Maurer Flag of the United States.svg  United States 3:43.33 2025 United States Championships
Fei Liwei Flag of the People's Republic of China.svg  China 3:44.24 2024 Summer Olympics
Marco De Tullio Flag of Italy.svg  Italy 3:44.892025 Sette Colli Trophy

Records

Prior to the competition, the existing world and championship records were as follows. [7]

World record Flag of Germany.svg  Lukas Märtens  (GER)3:39.96 Stockholm, Sweden12 April 2025
Competition recordFlag of Germany.svg Paul Biedermann (GER)3:40.07 Rome, Italy26 July 2009

Heats

The heats took place at 10:20. [8] Bulgaria's Petar Mitsin won the third heat with the fourth fastest qualifying time of 3:45.01, Australia's Samuel Short won the fourth heat with the fastest qualifying time of 3:42.07, and Germany's Lukas Märtens won the fifth and final heat with the second fastest qualifying time of 3:43.81. Australia's Elijah Winnington and the US's Rex Maurer, along with 2024 Olympic finalists Guilherme Costa and Fei Liwei, did not qualify. [9]

RankHeatLaneNameNationalityTimeNotes
144 Samuel Short Flag of Australia (converted).svg  Australia 3:42.07Q
254 Lukas Märtens Flag of Germany.svg  Germany 3:43.81Q
345 Kim Woo-min Flag of South Korea.svg  South Korea 3:44.99Q
437 Petar Mitsin Flag of Bulgaria.svg  Bulgaria 3:45.01Q
551 Zhang Zhanshuo Flag of the People's Republic of China.svg  China 3:45.04Q
659 Victor Johansson Flag of Sweden.svg  Sweden 3:45.26Q, NR [10]
743 Oliver Klemet Flag of Germany.svg  Germany 3:45.72Q
852 Marco De Tullio Flag of Italy.svg  Italy 3:45.88Q
938 Ethan Ekk Flag of Canada (Pantone).svg  Canada 3:46.01
1055 Elijah Winnington Flag of Australia (converted).svg  Australia 3:46.37
1156 Rex Maurer Flag of the United States.svg  United States 3:46.38
1247 Lucas Henveaux Flag of Belgium (civil).svg  Belgium 3:46.68
1350 Zalán Sárkány Flag of Hungary.svg  Hungary 3:46.82
1436 Jack McMillan Flag of the United Kingdom.svg  Great Britain 3:47.28
1530 Krzysztof Chmielewski Flag of Poland.svg  Poland 3:47.55
1658 Daniel Wiffen Flag of Ireland.svg  Ireland 3:47.57
1740 Dimitrios Markos Flag of Greece.svg  Greece 3:47.59
1848 Stephan Steverink Flag of Brazil.svg  Brazil 3:47.93
1934 Kazushi Imafuku Flag of Japan.svg  Japan 3:48.69
2033 Ilia Sibirtsev Flag of Uzbekistan.svg  Uzbekistan 3:48.75
2142 Kristóf Rasovszky Flag of Hungary.svg  Hungary 3:48.84
2253 Guilherme Costa Flag of Brazil.svg  Brazil 3:48.94
2341 David Aubry Flag of France.svg  France 3:49.13
2449 Antonio Djakovic Flag of Switzerland (Pantone).svg   Switzerland 3:49.14
2546 Fei Liwei Flag of the People's Republic of China.svg  China 3:49.68
2632 Sašo Boškan Flag of Slovenia.svg  Slovenia 3:49.86
2739 Yoav Romano Flag of Israel.svg  Israel 3:51.01
2835 Khiew Hoe Yean Flag of Malaysia.svg  Malaysia 3:51.11
2931 Juan Morales Flag of Colombia.svg  Colombia 3:51.24
3025 Kristupas Trepočka Flag of Lithuania.svg  Lithuania 3:51.34
3123 Milan Vojtko Flag of Slovakia.svg  Slovakia 3:51.97
3227 Glen Lim Flag of Singapore.svg  Singapore 3:54.97
3324 Marin Mogić Flag of Croatia.svg  Croatia 3:56.15
3421 Gian Santos Flag of the Philippines.svg  Philippines 3:57.86
3520 Kevin Teixeira Flag of Andorra.svg  Andorra 3:59.00
3657 Luka Mijatovic Flag of the United States.svg  United States 3:59.68
3726 Aryan Nehra Flag of India.svg  India 4:00.39
3828 Suleyman Ismayilzada Flag of Azerbaijan.svg  Azerbaijan 4:01.33
3922 Matthew Caldwell Flag of South Africa.svg  South Africa 4:01.45
4029 Alberto Vega Flag of Costa Rica.svg  Costa Rica 4:06.17
4114 Xavier Ventura Flag of El Salvador.svg  El Salvador 4:07.60
4215 Vladimir Hernández Mojarrieta Flag of Cuba.svg  Cuba 4:11.70
4313 Binura Thalagala Flag of Sri Lanka.svg  Sri Lanka 4:16.80

Final

The final took place at 19:02. [11]

RankLaneNameNationalityTimeNotes
Gold medal icon.svg5 Lukas Märtens Flag of Germany.svg  Germany 3:42.35
Silver medal icon.svg4 Samuel Short Flag of Australia (converted).svg  Australia 3:42.37
Bronze medal icon.svg3 Kim Woo-min Flag of South Korea.svg  South Korea 3:42.60
47 Victor Johansson Flag of Sweden.svg  Sweden 3:44.68 NR [10]
52 Zhang Zhanshuo Flag of the People's Republic of China.svg  China 3:44.82
68 Marco De Tullio Flag of Italy.svg  Italy 3:44.92
76 Petar Mitsin Flag of Bulgaria.svg  Bulgaria 3:45.28
81 Oliver Klemet Flag of Germany.svg  Germany 3:46.86

References

  1. "World Aquatics Championships – Singapore 2025". worldaquatics-singapore2025.com. Retrieved 5 July 2025.
  2. "Start list" (PDF). omegatiming.com. Retrieved 26 July 2025.
  3. Kaufman, Sophie (24 July 2025). "2025 Worlds Previews: New World Record Holder Lukas Märtens Leads Stacked Men's 400 Free Field". SwimSwam. Retrieved 24 July 2025.
  4. "Standard Entry Times" (PDF). World Aquatics . Retrieved 6 July 2025.
  5. "Competition Regulations" (PDF). World Aquatics . pp. 13–14. Retrieved 6 July 2025.
  6. "Qualifying | World Aquatics Official". World Aquatics. Retrieved 12 July 2025.
  7. "Records book" (PDF). omegatiming.com. 26 July 2025.
  8. "Heats results" (PDF). omegatiming.com. 27 July 2025.
  9. Wild, Mark (27 July 2025). "2025 World Championships: Day 1 Prelims Live Recap". SwimSwam. Retrieved 6 August 2025.
  10. 1 2 Kaufman, Sophie (27 July 2025). "2025 Worlds, Euro Recap: Lukas Märtens Earns 1st World Title, Completing Epic Year In 400 Free". SwimSwam. Retrieved 20 August 2025.
  11. "Final results" (PDF). omegatiming.com. 27 July 2025.