Progress against the field
Robbert Claassen has dropped 5:45 behind the field from Amsterdam 2024 to Amsterdam 2026.
The clock says 0:34 faster, but the races themselves got 6:19 quicker for everyone.
The longest gap between two races compared here, 328 days between Rotterdam 2025 and Amsterdam 2026, cost 2:36 on 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
6 races · 6 events
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Maastricht19 Sep 2026Doubles Open · Men1:09:10 PB131/457Beat 71%
↑ 295 days after Utrecht 2025, with Paul Schram 0:00 better than the field Why ↓Close ↑
2:26 faster on the clock, and the race was 2:26 faster for everyone. Whatever changed, it changed for all of them.
The fieldCompare these two →2:26 faster This pair2:26 faster -
Rotterdam15 Apr 2026Doubles Open · Men1:22:10399/580Beat 31%
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Amsterdam21 Jan 2026Individual Open · Men1:24:44 PB322/608Beat 47%
↑ 328 days after Rotterdam 2025 2:36 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:47 faster on the clock looks better than it was: the race was 4:23 faster for everyone, which leaves this 2:36 behind the field.
The fieldCompare these two →4:23 faster This athlete1:47 faster -
Utrecht28 Nov 2025Doubles Open · Men1:11:36116/461Beat 75%
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Rotterdam27 Feb 2025Individual Open · Men1:26:31643/1283Beat 50%
↑ 140 days after Amsterdam 2024 3:09 worse than the field Why ↓Close ↑
1:13 slower on the clock in a race that was 1:56 faster for everyone: 3:09 lost to the field.
The fieldCompare these two →1:56 faster This athlete1:13 slower -
Amsterdam10 Oct 2024Individual Open · Men1:25:18302/659Beat 54%