Progress against the field
Between Amsterdam 2026 and Heerenveen 2026, Tirza van Duin and Benjamin de Groot lost 0:56 to the field.
Over the same races everyone got 1:45 quicker, so 0:49 faster on the clock looks better than it was.
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 · Mixed1:19:18 PB228/461Beat 51%
↑ 113 days after Amsterdam 2026, with Benjamin de Groot 0:56 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:49 faster on the clock, yet the race was 1:45 faster for everyone, so 0:56 was lost on the field.
The fieldCompare these two →1:45 faster This pair0:49 faster -
Amsterdam21 Jan 2026Doubles Open · Mixed1:20:07215/496Beat 57%
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Maastricht19 Sep 2025Individual Open · Women1:47:55 PB246/348Beat 29%