2025 World Championships: Day 7 Swims You Might Have Missed

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
  • Finals: Day 1 | Day 2 | Day 3 | Day 4 | Day 5 | Day 6 | Day 7

We are getting down to the wire as there remains just one day of competition left at the 2025 World Championships. Despite bouts of illness making the rounds and general fatigue of a long meet, swimmers have been able to navigate through all of it and perform at their highest levels. We have covered some of the bigger swims, but here are a few that may have escaped your notice.

100 Free World Champion Marrit Steenbergen of The Netherlands, once again backed up the claim to being one of the best relay swimmers of all time, and certainly the best non-Australian. The Dutchwomen pulled double duty this morning, swimming in the prelims of the 50 free, placing 8th with a time of 24.62, and then anchoring their nation’s mixed free relay. On the relay, she split 51.95 to single-handedly bring her team up from what was 13th at the 300 to 3rd.

In the final, she was a little slower, but her 52.18 was still the fastest split in the field. Earlier in the week, Steenbergen dropped a 51.64 split, the 11th fastest flying split of all time and fastest by a non-Australian as only Cate Campbell, Emma McKeon, Shayna Jack, and Bronte Campbell have been faster.

Marie Wattel anchored the French relay this morning in 53.55 to help her team earn the #2 seed. In the evening session, Wattel moved up to the 3rd seed, but the veteran didn’t take it as a relegation as she split 52.74, to help her team, comprised of Maxime Grousset, Yann le Goff, and Beryl Gastaldello secure the bronze medal with a time of 3:21.35 and in the process set a new national record, bettering the previous record by .72. The previous record was set in 2018, when Wattel, on the same leg split 53.47.  The NAB team, who claimed silver, set a new European record while the Italians, who were out-touched by the French for 3rd, also set a new national record.

The previous European Record of 3:21.68 was set by the British in 2023, but the NAB team of Egor Kornev, Ivan Girev, Daria Trofimova, and Daria Klepikova blew by it as they recorded a new mark of 3:19.68. They weren’t the only ones to break a European Record on the night as Italy’s Simona Quadarella produced a time of 8:12.81, skipping 8:13 entirely as her previous national best was 8:14.55. With the swim, which got lost in the race between Summer McIntosh, Katie Ledecky and Lani Pallister, Quadarella surpassed Rebecca Adlington‘s old European Record of 8:14.10 from the 2008 Beijing Games and moved from the 8th fastest performer to 5th fastest performer ever.

Barbara Mazurkiewicz and Ksawery Masiuk each erased a record from the Polish National record book today. Mazurkiewicz, the 2025 World University Games silver medalist in the 100 breast (1:07.57) and bronze medalist in the 50 breast, was out like a bat in the prelims this morning, and posted the 5th fastest time of the morning, as she stopped the clock in 30.22, cutting .33 of Dominka Sztandera’s mark of 30.55 from the 2024 European Championships. While she was a little off at night, finishing 11th (30.54), her teammate Masiuk picked up where she left off.

The 2022 and 2024 Worlds medalist in the 50 back, Masiuk, a sprint specialist, scraped by in the prelims with an equal 15th place by recording a time of 24.89, just .01 faster than 17th place. Seeded into lane 8 in the 2nd heat, Masiuk made up for his fobbles this morning as he hit the wall in 24.41, the 3rd fastest time in the heat, but 4th fastest overall. His time undercut his previous best by .02 as his previous best and former national record was 24.44, which he set at the 2022 Worlds in Budapest.