Progress against the field
Between Belgium 2025 and Maastricht 2026, Nika Tilborghs and Zonne Iedema lost 4:52 to the field.
The clock says 2:13 faster, but the races themselves got 7:05 quicker for everyone.
241 days between Amsterdam 2026 and Maastricht 2026 is the longest gap compared here, and the second race was 1:42 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. The summary above covers Doubles Open · Women, with Zonne Iedema, the one raced most; every comparison is in the list below.
Every race
13 races · 11 events
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Valencia17 Oct 2026Doubles Open · Women1:08:147/168Beat 96%
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Maastricht19 Sep 2026Doubles Open · Women1:09:0413/708Beat 98%
↑ 241 days after Amsterdam 2026, with Zonne Iedema 1:42 worse than the field Why ↓Close ↑
1:42 behind the field: 2:13 slower on the clock, against 0:31 slower for everyone.
The fieldCompare these two →0:31 slower This pair2:13 slower -
Maastricht19 Sep 2026Doubles Open · Mixed1:07:0220/237Beat 92%
↑ 177 days after Mechelen 2026, with Timo Tilborghs 2:19 worse than the field Why ↓Close ↑
2:56 slower on the clock in a race that was 0:37 slower for everyone: 2:19 lost to the field.
The fieldCompare these two →0:37 slower This pair2:56 slower -
Heerenveen14 May 2026Individual Open · Women1:18:11 PB48/427Beat 89%
↑ 441 days after Rotterdam 2025 0:05 worse than the field Why ↓Close ↑
3:24 faster on the clock, and the race was 3:29 faster for everyone. Whatever changed, it changed for all of them.
The fieldCompare these two →3:29 faster This athlete3:24 faster -
Malaga16 Apr 2026Doubles Open · Mixed1:07:4275/546Beat 86%
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Mechelen26 Mar 2026Relay · Mixed1:00:177/67Beat 90%
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Mechelen26 Mar 2026Doubles Open · Mixed1:04:06 PB34/394Beat 91%
↑ 118 days after Utrecht 2025, with Timo Tilborghs 0:01 worse than the field Why ↓Close ↑
Moved with the field: 4:55 faster on the clock, against 4:56 faster for everyone.
The fieldCompare these two →4:56 faster This pair4:55 faster -
Amsterdam21 Jan 2026Doubles Open · Women1:06:51 PB14/1030Beat 99%
↑ 124 days after Maastricht 2025, with Zonne Iedema 0:33 better than the field Why ↓Close ↑
0:33 better than the field: 4:23 faster on the clock, against 3:50 faster for everyone.
The fieldCompare these two →3:50 faster This pair4:23 faster -
Utrecht28 Nov 2025Doubles Open · Mixed1:09:0120/381Beat 95%
↑ 414 days after Amsterdam 2024, with Timo Tilborghs 16:27 better than the field Why ↓Close ↑
16:27 better than the field: 20:08 faster on the clock, against 3:41 faster for everyone.
The fieldCompare these two →3:41 faster This pair20:08 faster -
Maastricht19 Sep 2025Doubles Open · Women1:11:1434/739Beat 95%
↑ 167 days after Belgium 2025, with Zonne Iedema 3:43 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:03 faster on the clock, yet the race was 3:46 faster for everyone, so 3:43 was lost on the field.
The fieldCompare these two →3:46 faster This pair0:03 faster -
Belgium5 Apr 2025Doubles Open · Women1:11:1736/713Beat 95%
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Rotterdam27 Feb 2025Individual Open · Women1:21:3568/411Beat 84%
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Amsterdam10 Oct 2024Doubles Open · Mixed1:29:09458/618Beat 26%