Progress against the field
Roeland Koops and Isabelle Fransen - Koops have gained 5:34 on the field from Heerenveen 2025 to Amsterdam 2026.
Over the same races everyone got 7:08 quicker, so 12:42 faster on the clock looks better than it was.
The biggest step was Heerenveen 2025 → Maastricht 2025: 8:04 on the field in 133 days.
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 Doubles Open · Mixed, with Isabelle Fransen - Koops, the one raced most; every comparison is in the list below.
Every race
6 races · 6 events
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Valencia17 Oct 2026Individual Open · Men1:36:57749/898Beat 17%
↑ 156 days after Barcelona 2026 6:48 worse than the field Why ↓Close ↑
6:08 slower on the clock in a race that was 0:40 faster for everyone: 6:48 lost to the field.
The fieldCompare these two →0:40 faster This athlete6:08 slower -
Barcelona14 May 2026Individual Open · Men1:30:49 PB842/1158Beat 27%
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Amsterdam21 Jan 2026Doubles Open · Mixed1:19:12255/506Beat 50%
↑ 54 days after Utrecht 2025, with Isabelle Fransen - Koops 5:59 worse than the field Why ↓Close ↑
1:09 slower on the clock in a race that was 4:50 faster for everyone: 5:59 lost to the field.
The fieldCompare these two →4:50 faster This pair1:09 slower -
Utrecht28 Nov 2025Doubles Open · Mixed1:18:03 PB194/701Beat 72%
↑ 70 days after Maastricht 2025, with Isabelle Fransen - Koops 3:29 better than the field Why ↓Close ↑
3:29 better than the field: 8:01 faster on the clock, against 4:32 faster for everyone.
The fieldCompare these two →4:32 faster This pair8:01 faster -
Maastricht19 Sep 2025Doubles Open · Mixed1:26:04212/364Beat 42%
↑ 133 days after Heerenveen 2025, with Isabelle Fransen - Koops 8:04 better than the field Why ↓Close ↑
5:50 faster on the clock in a race that was 2:14 slower for everyone: 8:04 better than the field.
The fieldCompare these two →2:14 slower This pair5:50 faster -
Heerenveen9 May 2025Doubles Open · Mixed1:31:54396/492Beat 20%