2025 World Championships
- July 27 – August 3, 2025 (pool swimming)
- Singapore, Singapore
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- LCM (50m)
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The Netherlands saw a tremendous swim in the prelims of men’s 4×100 medley relay this morning, as their relay team lowered the Dutch national record in the event.
The team of Kai van Westering, Caspar Corbeau, Nyls Korstanje and Sean Niewold threw down a time of 3:31.07 to shave .16 off of the standard.
The previous record was a 3:31.23, set at the World Championships in Doha in 2024 by van Westering, Arno Kamminga, Korstanje and Stan Pijnenburg.
Van Westering was out in 53.89 in the, putting the Netherlands 4th in their heat at the 100 mark, but Corbeau turned in a stunning performance on the breaststroke leg, splitting a 58.60 to overtake the rest of the field. Korstanje was 51.11 on the butterfly leg, while Niewold came home in 47.47 to secure 2nd-place in their heat.
Split Comparison
| New Record – 2025 | Old Record – 2024 | |
| Back | 53.89 (van Westering) | 53.84 (van Westering) |
| Breast | 58.60 (Corbeau) | 58.23 (Kamminga) |
| Fly | 51.11 (Korstanje) | 51.12 (Korstanje) |
| Free | 47.47 (Niewold) | 48.04 (Pijnenburg) |
| Total | 3:31.07 | 3:31.23 |
The Netherlands took 5th overall in prelims, putting them safely in the final for the event.

Not 100% sure if this is Corbeau’s first national record or not, but for someone who has been around for quite some time and always slightly behind Kamminga for these kinds of chances, it’s nice to see him clinch this record. Happy to see him doing tremendously well this entire meet! Props to van Westerling for being right on his best, Korstanje holding strong, and Niewold blowing well past anyone’s expectations as well.