Zurich Diamond League: Dos Santos and Russell Shatter Two Hurdles World Records in 40 Minutes

Brazil’s Alison dos Santos broke the men’s 400m hurdles world record with a time of 45.80 seconds and American Masai Russell shattered the women’s 100m hurdles world record at 12.09 seconds — two world records falling within 40 minutes of each other at the Weltklasse Zürich Diamond League meeting on 27 August 2026 in Zurich, Switzerland.

Dos Santos’s run erased Karsten Warholm’s five-year-old mark of 45.94 seconds, set by the Norwegian at the Tokyo Olympics in 2021, making him only the second man in history to run under 46 seconds in the event. Russell’s performance surpassed the previous women’s 100m hurdles record of 12.12 seconds held by Nigeria’s Tobi Amusan since 2022.

Dos Santos Rewrites History in the 400m Hurdles

According to Reuters, Dos Santos delivered a dominant wire-to-wire performance at the Letzigrund stadium, clocking 45.80 seconds to erase a mark that many considered one of the most untouchable in track and field. The 26-year-old Brazilian, a former world champion and Paris 2024 Olympic bronze medalist, took 0.14 seconds off Warholm’s record in conditions described by NBC Sports as producing “a crazy night in Zurich.”

The FISU federation, which previously supported Dos Santos during his student-athlete years, confirmed in a statement published on 28 August 2026 that he “sprinted to victory in 45.80 seconds, setting a new world record” and described it as making “sports history.” NBC Sports reported that Dos Santos had described his motivation as being “spurred by a painful Olympic experience,” referencing his bronze-medal finish at the Paris Games — an outcome he felt fell short of his potential.

Canadian Running Magazine noted that Dos Santos “became just the second man to run under 46 seconds” in the event, underlining the rarity of the achievement. The previous record had stood since the Tokyo Olympics, widely regarded as one of the greatest performances in the history of hurdles running.

Russell Completes a Historic Double: Women’s 100m Hurdles Record Falls

Less than 40 minutes after Dos Santos crossed the line, Masai Russell — the reigning Olympic champion — produced a run of her own. Russell, 26, surged away over the final hurdle to clock 12.09 seconds, bettering the previous mark of 12.12 held by Nigeria’s Tobi Amusan. Reuters reported that she “blazed to a world record” and “pulled away over the final hurdle” to complete a remarkable performance.

Olympics.com confirmed Russell “broke the women’s 100 metres hurdles world record at the Weltklasse Zürich on Thursday (27 August), clocking 12.09 at the Letzigrund.” The Hindu’s Sportstar outlet described her as having “surged ahead after clearing the last hurdle” in a controlled, commanding performance.

The 0.03-second improvement over Amusan’s record underlines how fine the margins are in elite sprinting — yet Russell’s execution was described by observers as composed rather than desperate, suggesting the time may be within reach again in the near term.

Two World Records, 40 Minutes Apart: A Night for the History Books

ESPN Philippines described the sequence plainly: “A couple of world records were broken less than 40 minutes apart at the Diamond League on Thursday, with Masai Russell of the United States breaking the women’s 100-meter hurdles record and Alison dos Santos of Brazil smashing the men’s 400-meter hurdles mark.” It is exceptionally rare for two global records in field events to fall at the same meet, let alone within a single hour.

The Weltklasse Zürich is one of the Diamond League’s flagship meetings, traditionally held at the Letzigrund stadium and attracting the world’s top athletes at the end of the European athletics season. The timing — late August, immediately before the global season winds down — made the performances all the more striking, as athletes typically reach peak form at this stage of the competitive calendar.

Records at a Glance: Before and After Zurich 2026

Context: What Made These Records Possible

For Dos Santos, the night in Zurich represented a redemption arc of sorts. The Brazilian had been considered a gold-medal favourite heading into the Paris 2024 Olympics but left with bronze — an outcome that, according to NBC Sports, directly fuelled his motivation heading into the 2026 season. FloTrack described his Zurich run as “a performance for the history books,” noting he “blasted to a stunning world record in the men’s 400m hurdles” in front of a capacity Letzigrund crowd.

Russell’s path to the record was equally compelling. As the reigning Olympic champion in the 100m hurdles, she had long been expected to challenge Amusan’s mark. The Letzigrund’s fast track, optimal late-summer conditions, and elite competition created the circumstances for a record attempt to succeed. RTL Today (Luxembourg) reported that the “26-year-old American clocked 12.09 seconds to beat the previous best of 12.12” — confirming the mark was officially ratified immediately after the race.

For context on how high the stakes are in elite athletics competition globally, the Diamond League series — which covers meets across Europe, Asia, and the Americas — serves as the premier one-day athletics circuit in the world, sitting just below the Olympic Games and World Championships in prestige. Singapore’s own athletics community follows the circuit closely, particularly with Asian athletes frequently competing for Diamond League trophies in field events.

Key Takeaways from Zurich 2026

• Alison dos Santos ran 45.80 seconds in the men’s 400m hurdles on 27 August 2026, breaking Karsten Warholm’s record of 45.94 set in 2021.
• Masai Russell clocked 12.09 seconds in the women’s 100m hurdles, beating Tobi Amusan’s 12.12 from 2022.
• Both records were set within 40 minutes at the Weltklasse Zürich Diamond League, Letzigrund stadium.
• Dos Santos became only the second man in history to run the 400m hurdles in under 46 seconds.
• The double-record night is considered one of the most extraordinary single sessions in modern athletics history.

What Comes Next for Dos Santos and Russell

Both athletes are expected to compete at remaining Diamond League finals and will be targeting the 2027 World Athletics Championships as the next major global target. For Dos Santos, the world record cements his status as the dominant force in the 400m hurdles for the foreseeable future. For Russell, retaining her Olympic title and now holding the world record makes her the clear benchmark in the women’s sprints-over-barriers.

Athletics fans in Singapore and across the Asia-Pacific region, who already track the Diamond League circuit closely given the series’ presence in meetings such as the Shanghai and Tokyo legs, will be watching both athletes’ next appearances with considerable interest. The events in Zurich on 27 August 2026 will be referenced as a landmark night in track and field for years to come, much as Warholm’s original 400m hurdles record in Tokyo 2021 shaped the narrative of that era — a story covered in detail by Reuters on 27 August 2026.

Whether either record is challenged before the end of the 2026 Diamond League season remains an open question. What is certain is that 27 August 2026 redrew the boundaries of what is possible in two of track and field’s most demanding and spectacular events.

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Sources

• Brazil’s Dos Santos, American Russell race to world hurdles records … — reuters.com
• https://www.olympics.com/en/news/masai-russell-100m-hurdles-world-record-zurich
• Dos Santos and Russell break world records in Zurich — diamondleague.com
• Masai Russell, Alison dos Santos Break World Records at Weltklasse Zurich Diamond League – Trackalerts.com, track and field news website — trackalerts.com
• Alison dos Santos breaks 400m hurdles world record, spurred by a painful Olympic experience — nbcsports.com