Progress against the field
Sander Kooiman has dropped 6:40 behind the field from Rotterdam 2024 to Rotterdam 2026.
Over the same races everyone got 14:08 quicker, so 7:28 faster on the clock looks better than it was.
327 days between Rotterdam 2024 and Rotterdam 2025 is the longest gap compared here, and the second race was 3:31 behind 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.
Every race
5 races · 5 events
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Rotterdam15 Apr 2026Individual Open · Men1:10:11 PB34/401Beat 92%
↑ 208 days after Maastricht 2025 3:32 worse than the field Faster on the clock, behind the field Why ↓Close ↑
3:42 faster on the clock, yet the race was 7:14 faster for everyone, so 3:32 was lost on the field.
The fieldCompare these two →7:14 faster This athlete3:42 faster -
Gent12 Dec 2025Doubles Open · Men1:08:55 PB334/1164Beat 71%
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Maastricht19 Sep 2025Individual Open · Men1:13:5386/584Beat 85%
↑ 204 days after Rotterdam 2025 0:23 better than the field Why ↓Close ↑
0:43 faster on the clock, and the race was 0:20 faster for everyone, so 0:23 of it was this athlete.
The fieldCompare these two →0:20 faster This athlete0:43 faster -
Rotterdam27 Feb 2025Individual Open · Men1:14:3681/600Beat 87%
↑ 327 days after Rotterdam 2024 3:31 worse than the field Faster on the clock, behind the field Why ↓Close ↑
3:03 faster on the clock, yet the race was 6:34 faster for everyone, so 3:31 was lost on the field.
The fieldCompare these two →6:34 faster This athlete3:03 faster -
Rotterdam6 Apr 2024Individual Open · Men1:17:39169/1380Beat 88%