Progress against the field
Between Maastricht 2025 and Heerenveen 2026, Dirk van Daalen de Jel and Tjem Kempen lost 1:50 to the field.
The clock says 4:23 faster, but the races themselves got 6:13 quicker for everyone.
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
14 races · 11 events
-
Heerenveen14 May 2026Doubles Open · Men57:154/535Beat 99%
-
Heerenveen14 May 2026Doubles Pro · Men56:4021/315Beat 93%
↑ 29 days after Rotterdam 2026, with Tjem Kempen 3:04 worse than the field Why ↓Close ↑
3:04 behind the field: 2:27 slower on the clock, against 0:37 faster for everyone.
The fieldCompare these two →0:37 faster This pair2:27 slower -
Rotterdam15 Apr 2026Doubles Open · Men59:3121/674Beat 97%
-
Rotterdam15 Apr 2026Doubles Pro · Men54:13 PB7/385Beat 98%
↑ 138 days after Utrecht 2025, with Tjem Kempen 0:33 worse than the field Faster on the clock, behind the field Why ↓Close ↑
3:36 faster on the clock looks better than it was: the race was 4:09 faster for everyone, which leaves this 0:33 behind the field.
The fieldCompare these two →4:09 faster This pair3:36 faster -
Gent12 Dec 2025Doubles Open · Men54:19 PB3/1164Beat 100%
-
Utrecht28 Nov 2025Doubles Pro · Men57:496/148Beat 96%
↑ 70 days after Maastricht 2025, with Tjem Kempen 1:47 better than the field Why ↓Close ↑
3:14 faster on the clock, and the race was 1:27 faster for everyone, so 1:47 of it was this pair.
The fieldCompare these two →1:27 faster This pair3:14 faster -
Maastricht19 Sep 2025Doubles Open · Men59:5832/821Beat 96%
-
Maastricht19 Sep 2025Doubles Pro · Men1:01:0321/131Beat 84%
-
Amsterdam10 Oct 2024Doubles Pro · Men1:06:3239/144Beat 73%
-
Rotterdam6 Apr 2024Doubles Open · Men1:03:2035/722Beat 95%
-
Amsterdam4 Nov 2023Doubles Open · Mixed1:04:19 PB4/283Beat 99%
-
Rotterdam20 May 2023Individual Open · Men1:11:51 PB47/575Beat 92%
-
Essen12 Nov 2022Doubles Open · Men1:17:2674/143Beat 48%
-
World Championships NiceDate unknownDoubles Pro · Mixed1:03:46 PB146/297Beat 51%