By Madeline Folsom on SwimSwam
World Aquatics World Cup #3 – Astana
October 15-17, 2026 Astana, Kazakhstan SCM (25 meters) Meet Central Results Entries How to Watch Recaps: Prelims: Day 1 | Day 2 Finals: Day 1 | Day 2There were two Belgian Records set on the 2nd day of competition at the World Cup in Astana.
Roos Vanotterdijk swam 54.80 to win the women’s 100 butterfly and break her own record of 55.20 from last week’s meet in Tashkent, and Lucas Henveaux swam 3:36.01 in the 400 freestyle to break his record of 3:36.71 from the 2024 SC Championships.
Women’s 100 Butterfly – Final
World Record: 52.71, Gretchen Walsh (USA) – 2024 World Cup Record: 53.10, Gretchen Walsh (USA) – 2025 Roos Vanotterdijk (BEL), 54.80 *Triple Crown* Yu Yiting (CHN), 55.17 Anastasiya Kuliashova (RUS), 56.68Vanotterdijk was out fast, splitting 25.41 (11.62/13.79) on the first 50 to sit about a tenth ahead of Yu Yiting, who split 25.53 (11.72/13.81) in 2nd place.
Vanotterdijk came home in 29.39 after splitting 14.40/14.99 on her final two 25s to be the only swimmer under 15 seconds on all four 25s.
Her swim took four tenths off the 55.20 mark she set at last week’s World Cup stop in Tashkent to become the 9th person in history under 55 seconds in the event.
She was faster on her first three 25s than she was in Tashkent, swimming 11.62/13.79/14.40 to outsplit her former record times of 11.69/14.04/14.52. Her closing split of 14.99 tonight was slightly slower than the 14.95 she swam in Tashkent.
Split Comparison
Vanotterdijk’s New Belgian Record — 54.80 Vanotterdijk’s Former Belgian Record — 55.20 25 11.62 11.69 50 13.79 (25.41) 14.04 (25.73) 75 14.40 14.52 100 14.99 (29.39) 14.95 (29.47) 54.80 55.20Vanotterdijk will also become the 7th fastest performer in history, sitting just five hundredths behind Torri Huske’s 54.75 from the 2022 SC Championships.
Top 10 Performers All-Time
Gretchen Walsh, USA — 52.71 (2024) Maggie MacNeil, CAN — 54.05 (2022) Kelsi Dahlia, USA — 54.59 (2021) Sarah Sjostrom, SWE — 54.61 (2014) Tessa Giele, NED — 54.66 (2024) Torri Huske, USA — 54.75 (2022) Roos Vanotterdijk, BEL — 54.80 (2026) Louise Hansson, SWE — 54.87 (2022) Alexandria Perkins, AUS — 54.93 (2025) Diana Bui Duyet, FRA — 55.05 (2009)Men’s 400 Freestyle – Timed Final
World Record: 3:32.25, Yannick Agnel (FRA), 2012 World Cup Record: 3:32.77, Paul Biedermann (GER), 2009 Lucas Henveaux (BEL), 3:36.01 *Crown Buster* Carson Foster (USA), 3:38.11 Oliver Papai (HUN), 3:40.52In the final event of the session, Lucas Henveaux came back in a big way on Carson Foster to win the men’s 400 freestyle and bust Foster’s Triple Crown by more than two seconds.
Henveaux was the runner-up at the first two stops, and his swim tonight was the fastest of the series, improving on the 3:37.44 he swam in Baku and 3:37.74 he swam in Tashkent. His final time of 3:36.01 also took seven tenths off his former record of 3:36.71 which he set at the 2024 SC World Championships.
Split Comparison
Henveaux New Belgian Record — 3:36.01 Henveaux Old Belgian Record — 3:36.71 100 52.06 51.90 200 54.78 55.28 300 54.88 55.06 400 54.29 54.47 3:36.01 3:36.71Read the full story on SwimSwam: Roos Vanotterdijk and Lucas Henveaux Set New Belgian Records On Night Two In Astana
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