Progress against the field
Between Rotterdam 2025 and Amsterdam 2026, Sebastiaan Van Leeuwen and Anieke Van Leeuwen lost 3:20 to the field.
Over the same races everyone got 5:03 quicker, so 1:43 faster on the clock looks better than it was.
The longest gap between two races compared here, 204 days between Rotterdam 2025 and Maastricht 2025, cost 4:50 on the field.
How this is worked out ⓘ
A finish time moves for two reasons: the athlete, and the race — its course, its floor, its day. For each pair of races in a row in one category, we take everyone who raced both and use the middle of how much they moved (the median) as "the race". Whatever is left is the athlete. Doubles are compared only when the same two people raced both, and told as the pair's; relays are left out. A pair with fewer than 15 athletes in common is not shown. The summary above covers Doubles Open · Mixed, with Anieke Van Leeuwen, the one raced most; every comparison is in the list below.
Every race
6 races · 6 events
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Heerenveen14 May 2026Doubles Open · Men1:16:50295/535Beat 45%
↑ 167 days after Utrecht 2025, with Rick Haasnoot 7:56 worse than the field Why ↓Close ↑
7:56 behind the field: 4:38 slower on the clock, against 3:18 faster for everyone.
The fieldCompare these two →3:18 faster This pair4:38 slower -
Amsterdam21 Jan 2026Doubles Open · Mixed1:12:28 PB302/1206Beat 75%
↑ 124 days after Maastricht 2025, with Anieke Van Leeuwen 1:30 better than the field Why ↓Close ↑
1:30 better than the field: 8:20 faster on the clock, against 6:50 faster for everyone.
The fieldCompare these two →6:50 faster This pair8:20 faster -
Utrecht28 Nov 2025Doubles Open · Men1:12:12 PB311/879Beat 65%
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Maastricht19 Sep 2025Doubles Open · Mixed1:20:48140/364Beat 62%
↑ 204 days after Rotterdam 2025, with Anieke Van Leeuwen 4:50 worse than the field Why ↓Close ↑
4:50 behind the field: 6:37 slower on the clock, against 1:47 slower for everyone.
The fieldCompare these two →1:47 slower This pair6:37 slower -
Rotterdam27 Feb 2025Doubles Open · Mixed1:14:11142/707Beat 80%
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Amsterdam10 Oct 2024Doubles Open · Men1:19:20555/855Beat 35%