Dos Santos shatters 400m mark as world records fall in Zurich
· Yahoo Sports
Brazil's Alison dos Santos smashed the 400m hurdles world record in an astonishing night of action at the Zurich Diamond League meeting.
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The 26-year-old has been in excellent form this season, undefeated in the event, but there was little to suggest that Karsten Warholm's 2021 mark of 45.94 seconds was under threat.
But, with Warholm a distant second, Tokyo 2025 silver medallist Dos Santos cantered off the final hurdle and pushed through to clock 45.80 seconds.
His previous personal best stood at 46.29 and was set four years ago.
Just 75 minutes later, another world record fell in front of the 25,000-strong capacity crowd
Masai Russell, the Olympic champion, capturing the 100m hurdles mark was less surprising, considering the American has finished within a tenth of a second of Tobi Amusan's 12.12-second landmark five times in the past two seasons.
The 26-year-old celebrated her 12.09 clocking with a finger to her lips as the crowd erupted. Just like Warholm, Amusan had a prime view of her record being broken, finishing second.
Both Dos Santos and Russell's times auger well for an evening in which Switzerland's Audrey Werro is primed for a shot at the 43-year-old women's 800m record, while competition from Greece's Emmanouil Karalis could push Armand 'Mondo' Duplantis towards his own pole vault mark.
Amy Hunt, winner of four golds at the European Championships earlier this month, found things tougher against some of the world's finest 100m runners.
Left in the blocks, the Briton had to watch on as Olympic champion Julian Alfred inflicted Melissa Jefferson-Wooden's first defeat over the distance in two years, edging out the American in a photo finish.
David Rudisha's 800m world record of one minute 40.91 seconds, set en route to gold at London 2012, also survived unscathed as his Kenyan compatriot Emmanuel Wanyonyi came home in one minute 41.76 seconds.