Progress against the field
From Heerenveen 2025 to Heerenveen 2026, Joeri Marcus and Merwin Korterink have moved with the field: what changed on the clock changed for everyone.
The clock says 4:30 faster, but the races themselves got 4:39 quicker for everyone.
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 · Men, with Merwin Korterink, the one raced most; every comparison is in the list below.
Every race
9 races · 7 events
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Heerenveen14 May 2026Doubles Open · Men59:5416/434Beat 96%
↑ 167 days after Utrecht 2025, with Merwin Korterink 0:47 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:31 faster on the clock, yet the race was 3:18 faster for everyone, so 0:47 was lost on the field.
The fieldCompare these two →3:18 faster This pair2:31 faster -
Gent12 Dec 2025Doubles Open · Men58:27 PB31/1164Beat 97%
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Utrecht28 Nov 2025Doubles Open · Men1:02:2563/879Beat 93%
↑ 203 days after Heerenveen 2025, with Merwin Korterink 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 · Men1:13:27 PB143/1352Beat 89%
↑ 133 days after Heerenveen 2025 16:33 better than the field Why ↓Close ↑
14:51 faster on the clock in a race that was 1:42 slower for everyone: 16:33 better than the field.
The fieldCompare these two →1:42 slower This athlete14:51 faster -
Heerenveen9 May 2025Individual Open · Men1:28:18718/1217Beat 41%
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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 · Men1:19:39327/1208Beat 73%