The short answer: Masai Russell ran 12.09 seconds for the women’s 100m hurdles at the Weltklasse Zurich Diamond League meeting on August 27, 2026. The legal 0.0 m/s wind makes the performance eligible for record recognition. It improved Tobi Amusan’s 12.12 world mark by 0.03 seconds, subject to the usual ratification process.
Masai Russell added a world record to her Olympic title with a 12.09-second victory at Letzigrund Stadium. The official Diamond League report says the American produced a clean run over the barriers and lowered the previous record by three hundredths of a second.
The record came in still conditions, with a wind reading of 0.0 m/s. NBC Sports reported that Amusan, the outgoing record holder, finished second in a season-best 12.23. European champion Nadine Visser was third in 12.34.
Masai Russell’s world-record race at a glance
| Detail | Verified result |
|---|---|
| Winning time | 12.09 seconds |
| Wind | 0.0 m/s, legal for record purposes |
| Previous record | 12.12 by Tobi Amusan, Eugene, 2022 |
| Margin of improvement | 0.03 seconds |
| Second place | Tobi Amusan, 12.23 season best |
| Third place | Nadine Visser, 12.34 season best |
| Meeting | Weltklasse Zurich, August 27, 2026 |
| Status | Reported as a world record, subject to standard ratification |
How Russell took down Tobi Amusan’s record
Amusan had held the official world record since the 2022 World Championships in Eugene. Russell arrived in Zurich already close to that level. Her 12.14 in May 2026 ranked behind only Amusan’s official mark, while a 12.17 from May 2025 had also placed her among the fastest women in history. The progression made Zurich a breakthrough, not an isolated result.
The World Athletics all-time list provides the clearest comparison because wind matters in sprint hurdles. A following wind above 2.0 m/s makes a mark ineligible for a world record. Amusan once ran 12.06 with a 2.5 m/s tailwind in 2022, so that faster clocking remains a wind-assisted performance rather than the official record.
Russell received no measurable tailwind in Zurich. After the race, she said a legal following wind could bring a sub-12-second performance into view. That is an athlete’s target, not a prediction that the barrier will fall at her next race.
Why the 0.0 wind reading matters
For short outdoor races, the wind gauge separates record-eligible performances from assisted times. A legal tailwind can still help a runner, but it cannot exceed 2.0 m/s. Zurich’s 0.0 reading means Russell’s time did not receive a recorded push from behind.
World Athletics’ August 27 meeting report identifies Russell’s 12.09 as a world record. Formal record ratification is an administrative process, so this article keeps the careful wording “pending formal ratification” unless World Athletics publishes a later status update.
Russell now owns Olympic gold and the world record
Russell won the Paris 2024 Olympic final in 12.33, giving the United States its first women’s 100m hurdles Olympic title since Brianna Rollins in 2016. The Zurich record moves her résumé beyond a single championship victory and confirms that her 2025 and 2026 speed translated into the fastest legal performance ever recorded.
According to NBC Sports’ historical comparison, Russell is the first woman since Bulgaria’s Yordanka Donkova to combine Olympic gold with the world record in the event. Donkova won the 1988 Olympic title and held the record from 1988 until Keni Harrison broke it in 2016. Russell and Harrison are the only US women to have held the official mark.
Alison dos Santos set the night’s other world record
Russell’s race came less than 40 minutes after Alison dos Santos rewrote the men’s 400m hurdles record. The World Athletics meeting report credits the Brazilian with 45.80, improving Karsten Warholm’s 45.94 from the Tokyo Olympic final by 0.14 seconds. Warholm was second in Zurich in 46.69.
The two results made hurdles the centre of an unusually fast evening. They were separate records in separate disciplines, each requiring its own ratification. Russell did not race dos Santos, and the proximity of the performances does not combine them into one record event.
BBC Sport’s live coverage followed the two record performances as they unfolded and also tracked the high-level results across the Zurich programme.
The bottom line
Masai Russell’s 12.09 in Zurich is the new benchmark for the women’s 100m hurdles, pending formal ratification. It came with a 0.0 m/s wind and against Tobi Amusan, whose 12.12 record she broke. Alison dos Santos also set a men’s 400m hurdles world record earlier that night.
Updated: September 10, 2026
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