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 | Day 2 | Day 3 | Day 4 | Day 5 | Day 6 | Day 7 | Day 8 Finals: Day 1 | Day 2 | Day 3 | Day 4 | Day 5 | Day 6 | Day 7The U.S. are in pole position for the relay tonight, taking the top seed while resting their stars. Australia put out a strong team, but they were able to cruise through their heat slightly to take the win and put themselves in lane 5 for this final.
Netherlands and France scratching the event helped leave space as Great Britain, Germany and Japan all qualified, but the battle for bronze will come from the teams able to bring in fresh faces – China, Canada and NAB.
USA- 3:54.49
The U.S. will swap out the entirety of their lineup from this morning after taking the top seed in 3:54.49. They had a 58-low leadoff from Katharine Berkoff and yet another 52-point split from Simone Manuel, but the U.S. has upgrades across the field to come in.
Those swimmers will be Regan Smith, Kate Douglass, Gretchen Walsh and Torri Huske. Walsh makes the biggest difference, with her best over two seconds faster than the 56.90 Curzan split this morning.
There is no real jeopardy about this lineup. All four are medalists individually, and Huske has answered any questions about her form with a 52.44 split on the mixed free relay last night. They may not quite break 3:50 as they did last summer, but this is a title-winning team.
Australia – 3:55.80
Australia will retain most of this morning’s relay lineup although Ella Ramsay could come in for Sienna Toohey on breaststroke, a possibility made slightly more likely after she scratched the 400 IM heats this morning. Kaylee McKeown and Mollie O’Callaghan were relaxed, going 59.06 and 53.06 on backstroke and freestyle respectively, but Alexandria Perkins had a big 56.73 split on fly.
This team probably has around three seconds to drop from those three legs, and should be the favorite for silver. Toohey and Ramsay were separated by just a hundredth of a second in the individual 100 breast, and would likely be around the 1:06-mid-to-high range regardless of which one is picked.
Germany – 3:56.44
Surprise package Germany will race next to the U.S. tonight after qualifying third and coming within three-quarters of a second of their supersuited National Record of 3:55.79. Anna Elendt, the 100 breast champion, was a fantastic 1:05.34 for the fastest breaststroke split in the field and Angelina Kohler (56.27) and Nina Holt (53.85) had splits right on their flat start bests.
Lise Seidel was just off her best of 1:00.64 on backstroke, but after hacking two seconds off her 200 backstroke this week may have a PB in store in the shorter event as well.
China – 3:56.70
China can and probably will swap out their first three legs tonight, bringing in Peng Xuwei, Tang Qianting and Zhang Yufei. Wu Qingfeng has been their go to freestyler so far this week and split 52.66 on the mixed medley relay, so will keep her spot.
Zhang was 55.96 on the fly leg of the mixed medley relay too, faster than Yu Yiting‘s 57.18 here, and Peng and Tang will give China around a second each if they are at the level they have shown this week. They have 3-3.5 seconds to play with here, which should put them in pole position for bronze.
Japan – 3:56.85
Japan got a big 1:05.50 breaststroke split from Satomi Suzuki, who just missed the medals individually in the 100 breast. They swam their full strength team this morning so don’t have too many avenues to improvement, with Mizuki Hirai and Nagusi Ikemoto swimming around their best relay split times this morning Hirai can be faster with a 56.33 flat start best, but with a couple of teams behind looking to drop chunks of time due to new swimmers, they will probably move down from 5th.
Canada – 3:58.32
Sophie Angus had a solid breaststroke split of 1:06.72, and will return tonight along with backstroker Kylie Masse, who can be a second faster then the 59.37 she led off with. Mary-SOphie Harvey likely comes out for Taylor Ruck on freestyle after Ruck was 52.94 on the mixed medley, although only 53.63 on the mixed free last night.
That would however allow Harvey to slide over onto fly, which she may do if a potential shoulder issue does not prevent her swimming fly. The other option for that leg would be Summer McIntosh, although with the 400 IM tonight she may not double up. Ruck should come in, but expect it to be Jansen to swap out and Harvey keep her place, just on a different leg.
Great Britain – 3:59.00
Great Britain will likely swap out Emily Richards for Keanna MacInnes on the fly leg, with Macinnes going 57.67 in the semi-finals individually and Richards just 58.88 here. Freya Anderson probably did enough to retain the freestyle leg ahead of Eva Okaro for tonight after going 54.01, although that one could go either way.
Their first two legs should be locked in Lauren Cox was 1:00.08 and Angharad Evans 1:06.03, with no potential replacements and both being solid swims. Evans can be around a second faster at her best as she has a flat-start time of 1:05.37, while Cox has been 59.60 on the 100 backstroke before. They could move up a spot or two, but the podium is a step too far.
NAB – 3:59.36
NAB squeaked into the final by just 0.11 seconds ahead of South Africa, but can bring in a pair of big upgrades on their back half tonight. Daria Klepikova split 55.97 on the mixed medley relay and will replace Arina Surkova‘s 57.81, and Daria Trofimova will come onto the free leg instead of Milana Stepanova.
Trofimova was 52.42 on the mixed free relay last night, more than two seconds faster than Stepanova’s 54.72 this morning. If Evgeniia Chikunova can drop some time from her 1:06.71 split this morning they could be in the fight for bronze.
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