By Retta Race 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 Finals: Day 1 | Day 2 | Day 3The women’s 100m backstroke on day three of these 2025 World Championships was a battle from start to finish, as we saw the familiar duo of American Regan Smith and Australian Kaylee McKeown go stroke-for-stroke in tonight’s main event.
When all was said and done, it was Olympic multi-champion McKeown who touched first, firing off a Championship Record of 57.16.
That blew away the previous meet mark of 57.53 the Aussie established at the 2023 edition of this competition. It also clocked a new personal best for the megastar, overtaking the 57.33 Australian, Oceanic and Olympic record she notched en route to claiming gold last year in Paris.
Tonight, Smith settled for silver a hair behind in 57.35 while fellow American Katharine Berkhoff earned the bronze in 58.15.
As for McKeown, the 24-year-old’s performance fell only 0.03 seconds outside Smith’s World Record of 57.13, set at the 2024 U.S. Olympic Trials. It checks in as the 2nd-swiftest outing ever.
Top 10 Women’s LCM Performances All-Time
57.13 – Regan Smith (USA), 2024 57.16 – Kaylee McKeown (AUS), 2025 57.28 – Regan Smith (USA), 2023 57.33 – Kaylee McKeown (AUS), 2024 & Kaylee McKeown (AUS), 2024 – 57.35 – Regan Smith (USA), 2025 57.41 – Kaylee McKeown (AUS), 2024 57.45 – Kaylee McKeown (AUS), 2021 57.46 – Regan Smith (USA), 2025 57.47 – Kaylee McKeown (AUS), 2021 & Regan Smith (USA), 2024Remarkably, McKeown and Smith have produced the top 24 best-ever performances between them.
McKeown’s New 57.16 Oceanic Record McKeown’s Old 57.33 Oceanic Record McKeown’s Old 57.53 World Championships Record 27.92 28.08 28.03 29.24 29.25 29.50McKeown’s feat this evening comes not only after she dropped the 50m back event but also after The Sydney Morning Herald’s Tom Decent reported that the Aussie suffered a dislocated shoulder after this year’s Aussie Trials.
Some news regarding Kaylee McKeown ahead of her showdown tonight with USA’s Regan Smith in the women’s 100m backstroke final.
Can reveal McKeown dislocated her shoulder in recent weeks. Something she’s been managing + other niggles
More details later @SMHsport. Final 9.49pm
— Tom Decent (@tomdecent) July 29, 2025
McKeown became the first woman ever to win gold in both the 100m backstroke and 200m backstroke at back-to-back Olympic Games.
Read the full story on SwimSwam: Despite Dislocated Shoulder, Kaylee McKeown Downs 100 Back World Championship Record
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