Progress against the field
Between Rotterdam 2025 and Heerenveen 2026, Bert Flier lost 5:48 to the field.
Over the same races everyone got 8:18 quicker, so 2:30 faster on the clock looks better than it was.
328 days between Rotterdam 2025 and Amsterdam 2026 is the longest gap compared here, and the second race was 1:15 behind 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.
Every race
6 races · 6 events
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Heerenveen14 May 2026Individual Open · Men1:04:5114/490Beat 97%
↑ 29 days after Rotterdam 2026 1:27 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:20 faster on the clock, yet the race was 1:47 faster for everyone, so 1:27 was lost on the field.
The fieldCompare these two →1:47 faster This athlete0:20 faster -
Rotterdam15 Apr 2026Individual Open · Men1:05:1121/570Beat 96%
↑ 84 days after Amsterdam 2026 3:06 worse than the field Why ↓Close ↑
0:58 slower on the clock in a race that was 2:08 faster for everyone: 3:06 lost to the field.
The fieldCompare these two →2:08 faster This athlete0:58 slower -
Mechelen26 Mar 2026Doubles Open · Men1:00:03 PB51/867Beat 94%
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Amsterdam21 Jan 2026Individual Open · Men1:04:13 PB20/570Beat 97%
↑ 328 days after Rotterdam 2025 1:15 worse than the field Faster on the clock, behind the field Why ↓Close ↑
3:08 faster on the clock, yet the race was 4:23 faster for everyone, so 1:15 was lost on the field.
The fieldCompare these two →4:23 faster This athlete3:08 faster -
Utrecht28 Nov 2025Doubles Open · Men1:06:45155/879Beat 82%
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Rotterdam27 Feb 2025Individual Open · Men1:07:2124/584Beat 96%