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Dos Santos and Russell smash hurdles world records
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Werro comes within 0.42sec of 800m world record
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Bednarek and Wanyonyi clock world-leading times
Masai Russell and Alison Dos Santos each set a world record while Mondo Duplantis won a historic pole vault on a frenetic Thursday night in Zurich.
The Letzigrund Stadium had a raucous sell-out 25,000 crowd and the still, balmy weather conditions helped the athletes no end.
