Progress against the field
Koen Abcouwer has dropped 8:43 behind the field from Rotterdam 2024 to Rotterdam 2026.
The clock says 3:58 faster, but the races themselves got 12:41 quicker for everyone.
The longest gap between two races compared here, 327 days between Rotterdam 2024 and Rotterdam 2025, cost 4:09 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.
Every race
5 races · 5 events
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Rotterdam15 Apr 2026Individual Open · Men1:31:07 PB349/556Beat 37%
↑ 138 days after Utrecht 2025 2:57 better than the field Why ↓Close ↑
8:16 faster on the clock, and the race was 5:19 faster for everyone, so 2:57 of it was this athlete.
The fieldCompare these two →5:19 faster This athlete8:16 faster -
Amsterdam21 Jan 2026Doubles Open · Men1:15:37 PB632/994Beat 36%
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Utrecht28 Nov 2025Individual Open · Men1:39:23437/575Beat 24%
↑ 274 days after Rotterdam 2025 7:31 worse than the field Why ↓Close ↑
6:43 slower on the clock in a race that was 0:48 faster for everyone: 7:31 lost to the field.
The fieldCompare these two →0:48 faster This athlete6:43 slower -
Rotterdam27 Feb 2025Individual Open · Men1:32:40409/600Beat 32%
↑ 327 days after Rotterdam 2024 4:09 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:25 faster on the clock looks better than it was: the race was 6:34 faster for everyone, which leaves this 4:09 behind the field.
The fieldCompare these two →6:34 faster This athlete2:25 faster -
Rotterdam6 Apr 2024Individual Open · Men1:35:05837/1380Beat 39%