Progress against the field
Between Rotterdam 2024 and Utrecht 2025, Jaco Vervloet pulled 7:10 ahead of the field.
Over the same races everyone got 9:10 quicker, so 16:20 faster on the clock looks better than it was.
The longest gap between two races compared here, 327 days between Rotterdam 2024 and Rotterdam 2025, still ended 4:39 ahead of 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
10 races · 10 events
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Stockholm18 Jun 2026Doubles Pro · Men1:04:53513/704Beat 27%
↑ 64 days after Rotterdam 2026, with Richard Proost 0:19 worse than the field Why ↓Close ↑
0:19 behind the field: 2:16 slower on the clock, against 1:57 slower for everyone.
The fieldCompare these two →1:57 slower This pair2:16 slower -
Heerenveen14 May 2026Relay · Men56:469/55Beat 84%
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Rotterdam15 Apr 2026Doubles Pro · Men1:02:37 PB92/385Beat 76%
↑ 208 days after Maastricht 2025, with Richard Proost 0:18 worse than the field Faster on the clock, behind the field Why ↓Close ↑
4:17 faster on the clock looks better than it was: the race was 4:35 faster for everyone, which leaves this 0:18 behind the field.
The fieldCompare these two →4:35 faster This pair4:17 faster -
EMEA London Olympia24 Mar 2026Doubles Open · Men1:00:31 PB167/455Beat 63%
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Utrecht28 Nov 2025Individual Open · Men1:15:11 PB185/1337Beat 86%
↑ 203 days after Heerenveen 2025 0:25 better than the field Why ↓Close ↑
0:32 faster on the clock, and the race was 0:07 faster for everyone, so 0:25 of it was this athlete.
The fieldCompare these two →0:07 faster This athlete0:32 faster -
Maastricht19 Sep 2025Doubles Pro · Men1:06:5438/102Beat 63%
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Heerenveen9 May 2025Individual Open · Men1:15:43270/1217Beat 78%
↑ 71 days after Rotterdam 2025 2:06 better than the field Why ↓Close ↑
2:06 better than the field: 4:35 faster on the clock, against 2:29 faster for everyone.
The fieldCompare these two →2:29 faster This athlete4:35 faster -
Cologne10 Apr 2025Doubles Pro · Men1:04:1720/76Beat 74%
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Rotterdam27 Feb 2025Individual Open · Men1:20:18190/600Beat 68%
↑ 327 days after Rotterdam 2024 4:39 better than the field Why ↓Close ↑
4:39 better than the field: 11:13 faster on the clock, against 6:34 faster for everyone.
The fieldCompare these two →6:34 faster This athlete11:13 faster -
Rotterdam6 Apr 2024Individual Open · Men1:31:31700/1380Beat 49%