By Sam Blacker on SwimSwam
2025 World Championships
July 27 – August 3, 2025 (pool swimming) Singapore, Singapore World Aquatics Championships Arena LCM (50m) Meet Central How To Watch SwimSwam Preview Index Entry Book Live Results Live Recaps Prelims: Day 1 Finals:Day 1 Finals Heat Sheet
Hello and welcome to the first finals session of the 2025 World Championships in Singapore!
We have a couple of huge battles in the 400 freestyles coming up, with teen phenom Summer McIntosh and stalwart Katie Ledecky to duke it out for gold after the Canadian set a brand new World Record earlier this year, with Sam Short and World Record Holder Lukas Maertens the two favorites for the men. Maertens broke Paul Biedermann‘s super-suited record after 16 years with a swim of 3:39.96, although he will only be in lane five tonight. 2024 World Champion Kim Woomin will be next to Short in lane 3 as he tries to make it three international podiums in a row.
The women’s 400 free will see a couple of big misses, as Claire Weinstein scratched the event and 2024 World Champion Erika Fairweather was disqualified in the heats.
McIntosh will double up with the 200 IM semifinals tonight, where Australian Tara Kinder is the top seed after a big PB in the heats. Alex Walsh and Mary-Sophie Harvey will also look to make it safely through to tomorrow’s final, with Walsh aiming to return to the podium after being DQed in Paris after finishing 3rd.
The men’s 50 fly sees European heavyweights Maxime Grousset and Noe Ponti enter as joint top seeds after tying in 22.74 this morning, with Thomas Ceccon, Nyls Korstanje, Ben Proud and Ilya Kharun also in the hunt for finals berths tomorrow.
Kirill Priogoda set a big best in the men’s 100 breaststroke as one of three men under 59 seconds, while 2023 World Champion made it through in 5th with a swim of 59.13. Reigning Olympic Champion Nicolo Martinenghi was 3rd in 58.84, with U.S. hopeful Campbell McKean squeaking through in joint-15th in 59.98
Gretchen Walsh is the big favorite in the women’s 100 fly, even more so now that Torri Huske is out of the event after scratching the heats. She will return for the women’s 4×100 free relay at the end of the session tonight, where the U.S. is the top seed in 3:33.57 and the favorite to take gold over longtime rivals Australia.
The men’s side will see the same battle, as the U.S. and Australia were separated by just 0.12 seconds this morning, Just seven-tenths of a second covered the rest of the finalists in the heats, so it looks like a tasty battle for the bronze medal, although Italy and China look to be the frontrunners.
Men’s 400 Freestyle – Final
World Record: 3:39.96 – Lukas Märtens, Germany (2025) World Junior Record: 3:44.31 – Petar Mitsin, Bulgaria (2023) Championship Record: 3:40.07 – Paul Biedermann, Germany (2009) 2023 World Champion: Sam Short, Australia – 3:40.68 2024 Olympic Champion: Lukas Märtens, Germany – 3:41.78
WOMEN’S 100 BUTTERFLY – Semifinals
World Record: 54.60– Gretchen Walsh, USA (2025) World Junior Record: 56.33– Mizuki Hirai, JPN (2024) Championship Record: 55.53 – Sarah Sjostroem, SWE (2017) 2023 World Champion – Zhang Yufei (CHN), 56.12 2024 Olympic Champion – Torri Huske (USA), 55.59Men’s 50 Fly – Semifinals
World Record: 22.27 – Andriy Govorov, Ukraine (2018) World Junior Record: 22.96 – Diogo Ribeiro, Portugal (2022) World Championships Record: 22.35 – Caeleb Dressel, United States (2019) 2023 World Champion: Thomas Ceccon, Italy (22.68)WOMEN’S 400 FREESTYLE – Final
World Record: 3:54.18 – Summer McIntosh, Canada (2025) World Junior Record: 3:56.08– Summer McIntosh, Canada (2023) Championship Record: 3:55.38 – Ariarne Titmus, Australia (2023) 2023 World Champion – Ariarne Titmus (AUS), 3:55.38 2024 Olympic Champion – Ariarne Titmus (AUS), 3:57.49Men’s 100 Breast – Semifinals
World Record: 56.88 – Adam Peaty, Great Britain (2019) World Junior Record: 59.01 – Nicolo Martinenghi, Italy (2017) World Championships Record: 56.88 – Adam Peaty, Great Britain (2019) 2023 World Champion – Qin Haiyang (CHN) – 57.69 2024 Olympic Champion: 59.03 – Nicolo Martinenghi, ItalyWomen’s 200 IM — Semifinals
World Record: 2:05.70 — Summer McIntosh, CAN (2025) World Junior Record: 2:06.56 — Summer McIntosh, CAN (2024) Championship Record: 2:06.12 — Katinka Hosszu, HUN (2015) 2023 World Champion: 2:07.17 — Kate Douglass, USA 2024 Olympic Champion: 2:06.56 — Summer McIntosh, CANWomen’s 4×100 Free Relay – Final
World Record: 3:27.96 – AUS (M. O’Callaghan, S. Jack, M. Harris, E. McKeon), 2023 World Junior Record: 3:36.19 – CAN (T. Ruck, P. Oleksiak, R. Smith, K. Sanchez) – 2017 Championship Record: 3:27.96 – AUS (M. O’Callaghan, S. Jack, M. Harris, E. McKeon), 2023 2023 World Champion: AUS (M. O’Callaghan, S. Jack, M. Harris, E. McKeon) – 3:27.96 2024 Olympic Champion – AUS (M. O’Callaghan, S. Jack, E. McKeon, M. Harris) – 3:28.92Men’s 4×100 Freestyle Relay – Final
World Record: 3:08.24 – United States (M. Phelps, G. Weber-Gale, C. Jones, J. Lezak) (2008) World Junior Record: 3:15.49 — United States (D. Diehl, M. Williamson, H. Williams, J. Zhao) (2023) World Championship Record: 3:09.06 — United States (C. Dressel, B. Pieroni, Z. Apple, N. Adrian) (2019) 2023 World Champion: Australia- 3:10.16 2024 Olympic Champion: United States- 3:09.28Read the full story on SwimSwam: 2025 World Championships: Day 1 Finals Live Recap
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