Progress against the field
Between Karlsruhe 2025 and Amsterdam 2026, Merwin Korterink pulled 1:18 ahead of the field.
Over the same races everyone got 4:46 quicker, so 6:04 faster on the clock looks better than it was.
202 days between Karlsruhe 2025 and Maastricht 2025 is the longest gap compared here, and the second race was 13:58 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. The summary above covers Individual Open · Men, the one raced most; every comparison is in the list below.
Every race
8 races · 7 events
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Heerenveen14 May 2026Doubles Open · Men59:54 PB16/434Beat 96%
↑ 167 days after Utrecht 2025, with Joeri Marcus 0:47 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:31 faster on the clock looks better than it was: the race was 3:18 faster for everyone, which leaves this 0:47 behind the field.
The fieldCompare these two →3:18 faster This pair2:31 faster -
Amsterdam21 Jan 2026Individual Open · Men1:10:24 PB84/608Beat 86%
↑ 124 days after Maastricht 2025 15:16 better than the field Why ↓Close ↑
23:15 faster on the clock, and the race was 7:59 faster for everyone, so 15:16 of it was this athlete.
The fieldCompare these two →7:59 faster This athlete23:15 faster -
Utrecht28 Nov 2025Doubles Open · Men1:02:2563/879Beat 93%
↑ 203 days after Heerenveen 2025, with Joeri Marcus 0:38 better than the field Why ↓Close ↑
1:59 faster on the clock, and the race was 1:21 faster for everyone, so 0:38 of it was this pair.
The fieldCompare these two →1:21 faster This pair1:59 faster -
Maastricht19 Sep 2025Individual Open · Men1:33:39801/1352Beat 41%
↑ 202 days after Karlsruhe 2025 13:58 worse than the field Why ↓Close ↑
13:58 behind the field: 17:11 slower on the clock, against 3:13 slower for everyone.
The fieldCompare these two →3:13 slower This athlete17:11 slower -
Heerenveen9 May 2025Relay · Men58:527/21Beat 67%
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Heerenveen9 May 2025Doubles Open · Men1:04:2425/309Beat 92%
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Cologne10 Apr 2025Doubles Open · Men1:06:5239/149Beat 74%
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Karlsruhe1 Mar 2025Individual Open · Men1:16:28245/1208Beat 80%