Progress against the field
From Rotterdam 2024 to Mechelen 2026, Sjoerd De Haan got 11:02 faster than the field.
Over the same races everyone got 11:29 quicker, so 22:31 faster on the clock looks better than it was.
655 days between Rotterdam 2024 and Amsterdam 2026 is the longest gap compared here, and the second race was 9:39 better than 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
5 races · 5 events
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Mechelen26 Mar 2026Individual Open · Men1:19:03 PB310/747Beat 59%
↑ 64 days after Amsterdam 2026 1:23 better than the field Why ↓Close ↑
1:23 better than the field: 3:47 faster on the clock, against 2:24 faster for everyone.
The fieldCompare these two →2:24 faster This athlete3:47 faster -
Amsterdam21 Jan 2026Individual Open · Men1:22:50768/1620Beat 53%
↑ 655 days after Rotterdam 2024 9:39 better than the field Why ↓Close ↑
9:39 better than the field: 18:44 faster on the clock, against 9:05 faster for everyone.
The fieldCompare these two →9:05 faster This athlete18:44 faster -
Maastricht19 Sep 2025Doubles Open · Mixed1:24:26181/364Beat 50%
↑ 204 days after Rotterdam 2025, with Rieneke van Breugel 0:56 better than the field Slower on the clock, ahead of the field Why ↓Close ↑
0:51 slower on the clock, but the race was 1:47 slower for everyone, so this was 0:56 better than the field.
The fieldCompare these two →1:47 slower This pair0:51 slower -
Rotterdam27 Feb 2025Doubles Open · Mixed1:23:35 PB185/353Beat 48%
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Rotterdam6 Apr 2024Individual Open · Men1:41:341049/1380Beat 24%