Progress against the field
Between Amsterdam 2024 and Rotterdam 2026, Ronald Boer and Remco Groeneveld lost 8:28 to the field.
The clock says 1:36 slower, but the races themselves got 6:52 quicker for everyone.
The longest gap between two races compared here, 237 days between Belgium 2025 and Utrecht 2025, cost 2:50 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. The summary above covers Doubles Open · Men, with Remco Groeneveld, the one raced most; every comparison is in the list below.
Every race
20 races · 18 events
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Maastricht19 Sep 2026Individual Open · Men1:22:48480/1119Beat 57%
↑ 569 days after Rotterdam 2025 11:20 worse than the field Why ↓Close ↑
9:00 slower on the clock in a race that was 2:20 faster for everyone: 11:20 lost to the field.
The fieldCompare these two →2:20 faster This athlete9:00 slower -
Heerenveen14 May 2026Doubles Pro · Men1:04:04 PB91/315Beat 71%
↑ 113 days after Amsterdam 2026, with Remco Groeneveld 1:21 better than the field Why ↓Close ↑
2:13 faster on the clock, and the race was 0:52 faster for everyone, so 1:21 of it was this pair.
The fieldCompare these two →0:52 faster This pair2:13 faster -
Rotterdam15 Apr 2026Doubles Open · Men1:01:1927/580Beat 95%
↑ 20 days after Mechelen 2026, with Remco Groeneveld 1:06 worse than the field Why ↓Close ↑
0:47 slower on the clock in a race that was 0:19 faster for everyone: 1:06 lost to the field.
The fieldCompare these two →0:19 faster This pair0:47 slower -
Mechelen26 Mar 2026Doubles Open · Men1:00:3253/593Beat 91%
↑ 118 days after Utrecht 2025, with Remco Groeneveld 1:59 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:35 faster on the clock, yet the race was 3:34 faster for everyone, so 1:59 was lost on the field.
The fieldCompare these two →3:34 faster This pair1:35 faster -
Amsterdam21 Jan 2026Doubles Pro · Men1:06:1733/94Beat 65%
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Utrecht28 Nov 2025Doubles Open · Men1:02:0758/879Beat 93%
↑ 237 days after Belgium 2025, with Remco Groeneveld 2:50 worse than the field Why ↓Close ↑
2:50 behind the field: 2:46 slower on the clock, against 0:04 faster for everyone.
The fieldCompare these two →0:04 faster This pair2:46 slower -
Heerenveen9 May 2025Doubles Open · Men1:01:4630/529Beat 94%
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Belgium5 Apr 2025Doubles Open · Men59:21 PB36/898Beat 96%
↑ 177 days after Amsterdam 2024, with Remco Groeneveld 2:33 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:22 faster on the clock looks better than it was: the race was 2:55 faster for everyone, which leaves this 2:33 behind the field.
The fieldCompare these two →2:55 faster This pair0:22 faster -
Rotterdam27 Feb 2025Individual Open · Men1:13:48 PB83/584Beat 86%
↑ 859 days after Amsterdam 2022 10:54 better than the field Why ↓Close ↑
16:38 faster on the clock, and the race was 5:44 faster for everyone, so 10:54 of it was this athlete.
The fieldCompare these two →5:44 faster This athlete16:38 faster -
Frankfurt14 Dec 2024Doubles Pro · Men1:05:0942/137Beat 69%
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Amsterdam10 Oct 2024Relay · Men53:182/15Beat 87%
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Amsterdam10 Oct 2024Doubles Open · Men59:4321/855Beat 98%
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Rotterdam6 Apr 2024Relay · Mixed1:07:414/18Beat 78%
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Rotterdam6 Apr 2024Individual Pro · Men1:19:1142/149Beat 72%
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Karlsruhe16 Mar 2024Individual Pro · Men1:18:39 PB77/177Beat 57%
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Maastricht20 Jan 2024Doubles Pro · Men1:04:137/23Beat 70%
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Amsterdam4 Nov 2023Individual Pro · Men1:25:4742/102Beat 59%
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Maastricht European Championships21 Jan 2023Doubles Open · Men1:06:2244/185Beat 76%
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Amsterdam22 Oct 2022Individual Open · Men1:30:26319/561Beat 43%
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World Championships ManchesterDate unknownDoubles Open · Men1:10:16218/250Beat 13%