Men's 400 metre freestyle at the 2025 World Aquatics Championships | ||||||||||
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Venue | World Aquatics Championships Arena | |||||||||
Location | Singapore Sports Hub, Kallang | |||||||||
Dates | 27 July | |||||||||
Competitors | 43 from 36 nations | |||||||||
Winning time | 3:42.35 | |||||||||
Medalists | ||||||||||
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2025 World Aquatics Championships | |||
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Artistic swimming | |||
Solo | |||
Technical | men | women | |
Free | men | women | |
Duet | |||
Technical | women | mixed | |
Free | women | mixed | |
Team | |||
Technical | mixed | ||
Free | mixed | ||
Acrobatic | mixed | ||
Diving | |||
Individual | |||
1 m | men | women | |
3 m | men | women | |
10 m | men | women | |
Synchronised | |||
3 m | men | women | mixed |
10 m | men | women | mixed |
Individual & Synchronised | |||
Team | mixed | ||
High diving | |||
20 m | women | ||
27 m | men | ||
Open water swimming | |||
Individual | |||
3 km knockout sprints | men | women | |
5 km | men | women | |
10 km | men | women | |
Relay | |||
4 × 1.5 km | mixed | ||
Swimming | |||
Freestyle | |||
50 m | men | women | |
100 m | men | women | |
200 m | men | women | |
400 m | men | women | |
800 m | men | women | |
1500 m | men | women | |
Backstroke | |||
50 m | men | women | |
100 m | men | women | |
200 m | men | women | |
Breaststroke | |||
50 m | men | women | |
100 m | men | women | |
200 m | men | women | |
Butterfly | |||
50 m | men | women | |
100 m | men | women | |
200 m | men | women | |
Individual medley | |||
200 m | men | women | |
400 m | men | women | |
Freestyle relay | |||
4 × 100 m | men | women | mixed |
4 × 200 m | men | women | |
Medley relay | |||
4 × 100 m | men | women | mixed |
Water polo | |||
Tournament | men | women | |
Rosters | men | women | |
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]
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]
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]
Swimmer | Country | Time | Competition |
---|---|---|---|
Lukas Märtens | ![]() | 3:39.96 | 2025 Malmsten Swim Open Stockholm |
Samuel Short | ![]() | 3:41.03 | 2025 Australian Trials |
Elijah Winnington | ![]() | 3:41.41 | 2024 Australian Championships |
Kim Woo-min | ![]() | 3:42.42 | 2024 Mare Nostrum Tour (Monaco) |
Guilherme Costa | ![]() | 3:42.76 | 2024 Summer Olympics |
Oliver Klemet | ![]() | 3:42.81 | 2024 Gothaer & friends meet |
Felix Auböck | ![]() | 3:43.24 | 2024 European Championships |
Rex Maurer | ![]() | 3:43.33 | 2025 United States Championships |
Fei Liwei | ![]() | 3:44.24 | 2024 Summer Olympics |
Marco De Tullio | ![]() | 3:44.89 | 2025 Sette Colli Trophy |
Prior to the competition, the existing world and championship records were as follows. [7]
World record | ![]() | 3:39.96 | Stockholm, Sweden | 12 April 2025 |
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Competition record | ![]() | 3:40.07 | Rome, Italy | 26 July 2009 |
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]
The final took place at 19:02. [11]
Rank | Lane | Name | Nationality | Time | Notes |
---|---|---|---|---|---|
![]() | 5 | Lukas Märtens | ![]() | 3:42.35 | |
![]() | 4 | Samuel Short | ![]() | 3:42.37 | |
![]() | 3 | Kim Woo-min | ![]() | 3:42.60 | |
4 | 7 | Victor Johansson | ![]() | 3:44.68 | NR [10] |
5 | 2 | Zhang Zhanshuo | ![]() | 3:44.82 | |
6 | 8 | Marco De Tullio | ![]() | 3:44.92 | |
7 | 6 | Petar Mitsin | ![]() | 3:45.28 | |
8 | 1 | Oliver Klemet | ![]() | 3:46.86 |