Progress against the field
Jessica Herbert and Hayley van Nieuwkerk have gained 2:27 on the field from Johannesburg I 2025 to Johannesburg 2025.
Over the same races everyone got 1:02 slower, so 1:25 faster on the clock looks worse 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
2 races · 2 events
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Johannesburg29 Nov 2025Doubles Open · Women1:26:40 PB87/714Beat 88%
↑ 273 days after Johannesburg I 2025, with Hayley van Nieuwkerk 2:27 better than the field Why ↓Close ↑
1:25 faster on the clock in a race that was 1:02 slower for everyone: 2:27 better than the field.
The fieldCompare these two →1:02 slower This pair1:25 faster -
Johannesburg I1 Mar 2025Doubles Open · Women1:28:05180/547Beat 67%