World Aquatics World Cup #3 – Astana
Roos Vanotterdijk continued her assault on the Belgian Record books during the opening day of the third and final World Cup stop in Astana, re-breaking her own mark in the women’s 50 butterfly.
Vanotterdijk won the event in a time of 24.56, lowering the national record of 24.75 she set last week in Tashkent while completing the Triple Crown for sweeping the 50 fly at all three World Cup stops.
Coming into the World Cup, the 21-year-old held the Belgian Record at 24.84, set at the 2025 SC European Championships. She won the opening stop in Baku in a time of 24.96 before setting back-to-back national records in Tashkent and Astana.
Thursday’s performance moves Vanotterdijk up into a tie for #8 all-time in the event, cracking the top 10 for the first time after previously sitting in a tie for 21st.
All-Time Performers, Women’s 50 Butterfly (LCM)
- Gretchen Walsh (USA), 23.72 – 2025 World Cup – Carmel
- Therese Alshammar (SWE), 24.38 – 2009 World Cup – Singapore
- Kate Douglass (USA), 24.42 – 2024 World Cup – Singapore
- Beryl Gastaldello (FRA), 24.43 – 2024 SC World Championships
- Ranomi Kromowidjojo (NED), 24.44 – 2021 SC World Championships
- Sarah Sjostrom (SWE), 24.50 – 2021 SC European Championships
- Claire Curzan (USA), 24.55 – 2021 SC World Championships
- Melanie Henique (FRA) / Roos Vanotterdijk (BEL), 24.56 – 2019 SC European Championships / 2026 World Cup – Astana
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- Inge Dekker (NED), 24.59 – 2014 World Cup – Dubai
Vanotterdijk has now broken six Belgian Records so far at the World Cup.
After breaking the 100 fly mark in Baku in a time of 55.29, Vanotterdijk took down four national records last week in Tashkent, doing so in the 50 back (26.31), 50 fly (24.75), 100 fly (55.20) and 100 IM (56.68).
The 50 fly was her only entry on Day 1 in Astana, with the meet having a altered schedule compared to Baku and Tashkent. She’s entered in the 100 fly, 100 IM and 200 IM for the rest of the meet, with a second Triple Crown on the line for her in the 100 fly.
She’s also in a fight for a podium spot in the overall series standings, coming into Astana ranked #3 behind Marrit Steenbergen and Yu Yiting.
