Progress against the field
From Heerenveen 2025 to Rotterdam 2026, Guus Groels got 0:15 faster than the field.
Over the same races everyone got 7:48 quicker, so 8:03 faster on the clock looks better than it was.
Ahead of the field in 3 of 4 comparisons.
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 · Men1:08:25 PB37/570Beat 94%
↑ 84 days after Amsterdam 2026 1:39 better than the field Why ↓Close ↑
1:39 better than the field: 3:47 faster on the clock, against 2:08 faster for everyone.
The fieldCompare these two →2:08 faster This athlete3:47 faster -
Amsterdam21 Jan 2026Individual Open · Men1:12:12263/1620Beat 84%
↑ 55 days after Madrid 2025 6:25 worse than the field Why ↓Close ↑
2:42 slower on the clock in a race that was 3:43 faster for everyone: 6:25 lost to the field.
The fieldCompare these two →3:43 faster This athlete2:42 slower -
Madrid27 Nov 2025Individual Open · Men1:09:30119/1312Beat 91%
↑ 69 days after Maastricht 2025 1:36 better than the field Why ↓Close ↑
5:15 faster on the clock, and the race was 3:39 faster for everyone, so 1:36 of it was this athlete.
The fieldCompare these two →3:39 faster This athlete5:15 faster -
Maastricht19 Sep 2025Individual Open · Men1:14:45173/1352Beat 87%
↑ 133 days after Heerenveen 2025 3:25 better than the field Why ↓Close ↑
The race was 1:42 slower for everyone and the clock still says 1:43 faster: 3:25 gained on the field.
The fieldCompare these two →1:42 slower This athlete1:43 faster -
Heerenveen9 May 2025Individual Open · Men1:16:2858/325Beat 82%