Progress against the field
Between Rotterdam 2025 and Rotterdam 2026, Yones Boulfaja lost 16:16 to the field.
The clock says 7:58 slower, but the races themselves got 8:18 quicker for everyone.
204 days between Rotterdam 2025 and Maastricht 2025 is the longest gap compared here, and the second race was 7:00 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
4 races · 4 events
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Rotterdam15 Apr 2026Individual Open · Men1:24:26192/401Beat 52%
↑ 20 days after Mechelen 2026 3:37 better than the field Why ↓Close ↑
3:16 faster on the clock in a race that was 0:21 slower for everyone: 3:37 better than the field.
The fieldCompare these two →0:21 slower This athlete3:16 faster -
Mechelen26 Mar 2026Individual Open · Men1:27:42894/1363Beat 34%
↑ 188 days after Maastricht 2025 12:53 worse than the field Why ↓Close ↑
4:34 slower on the clock in a race that was 8:19 faster for everyone: 12:53 lost to the field.
The fieldCompare these two →8:19 faster This athlete4:34 slower -
Maastricht19 Sep 2025Individual Open · Men1:23:08436/1352Beat 68%
↑ 204 days after Rotterdam 2025 7:00 worse than the field Why ↓Close ↑
7:00 behind the field: 6:40 slower on the clock, against 0:20 faster for everyone.
The fieldCompare these two →0:20 faster This athlete6:40 slower -
Rotterdam27 Feb 2025Individual Open · Men1:16:28 PB119/600Beat 80%