Progress against the field
Sander Siderius and Robbie Siderius have dropped 11:15 behind the field from Heerenveen 2025 to Heerenveen 2026.
Over the same races everyone got 5:03 quicker, so 6:12 slower on the clock looks better than it was.
The longest gap between two races compared here, 217 days between Heerenveen 2025 and Gent 2025, cost 11:02 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.
Every race
3 races · 3 events
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Heerenveen14 May 2026Doubles Open · Men1:29:08458/494Beat 7%
↑ 153 days after Gent 2025, with Robbie Siderius 0:13 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:56 faster on the clock, yet the race was 2:09 faster for everyone, so 0:13 was lost on the field.
The fieldCompare these two →2:09 faster This pair1:56 faster -
Gent12 Dec 2025Doubles Open · Men1:31:041087/1164Beat 7%
↑ 217 days after Heerenveen 2025, with Robbie Siderius 11:02 worse than the field Why ↓Close ↑
8:08 slower on the clock in a race that was 2:54 faster for everyone: 11:02 lost to the field.
The fieldCompare these two →2:54 faster This pair8:08 slower -
Heerenveen9 May 2025Doubles Open · Men1:22:56 PB430/529Beat 19%