USA’s Russell and Brazil’s Dos Santos smash world records on ‘crazy’ night in Zurich

• Dos Santos and Russell smash hurdles world records

• Werro comes within 0.42sec of 800m world record

• 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.