Femke Bol put the seal on a fantastic season by retaining her world 400 metres hurdles title in emphatic style on Friday as the Dutchwoman stormed home in a world-leading 51.54 seconds.
Jasmine Jones of the U.S. finished like a train to take silver in a personal best of 52.08, while Emma Zapletalova got a surprise bronze in a Slovakian national record of 53.00.
Bol won eight races in a
