Progress against the field
From Johannesburg I 2025 to Johannesburg 2026, the field gained 9:42 on Michael van Tonder and Tarryn Ostrom.
Over the same races everyone got 7:33 quicker, so 2:09 slower on the clock looks better than it was.
273 days between Johannesburg I 2025 and Johannesburg 2025 is the longest gap compared here, and the second race was 4:51 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.
Every race
3 races · 3 events
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Johannesburg30 May 2026Doubles Open · Mixed1:26:08231/684Beat 66%
↑ 182 days after Johannesburg 2025, with Tarryn Ostrom 4:51 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:59 faster on the clock looks better than it was: the race was 6:50 faster for everyone, which leaves this 4:51 behind the field.
The fieldCompare these two →6:50 faster This pair1:59 faster -
Johannesburg29 Nov 2025Doubles Open · Mixed1:28:07217/594Beat 64%
↑ 273 days after Johannesburg I 2025, with Tarryn Ostrom 4:51 worse than the field Why ↓Close ↑
4:08 slower on the clock in a race that was 0:43 faster for everyone: 4:51 lost to the field.
The fieldCompare these two →0:43 faster This pair4:08 slower -
Johannesburg I1 Mar 2025Doubles Open · Mixed1:23:59 PB117/372Beat 69%