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It鈥檚 a power hour of athletics, with world titles decided in the women鈥檚 100m hurdles and the men's and women's 400m.

The participation of sprint hurdles world champion Tobi Amusan was thrown into doubt after she was charged last month with missing three doping tests. Even without her, the final promises to be a memorable showdown involving Olympic champion Jasmine Camacho-Quinn, 2019 world gold medallist Nia Ali and her fellow Americans.

A first global gold surely beckons for the Netherlands' Femke Bol, who has been the outstanding female 400m hurdler this year. And Briton Matt Hudson-Smith is seeking to repeat his podium finish from last year in the men鈥檚 400m, with Olympic champions past and present Wayde van Niekerk and Steven Gardiner looking in ominously good form this summer.