American Athing Mu shook off the disappointment of her third-place finish at worlds to win the women's 800 metres in 1:54.97, holding off Britain's Keely Hodgkinson, who finished second in 1:55.19.
Images from the World Athletics Championships in Eugene, Oregon, on Thursday, Day 7.
Images from the World Athletics Championships on Sunday, Day 3, in Oregon.
Olympic champions Elaine Thompson-Herah, Selemon Barega, Armand Duplantis, Steven Gardiner, Emmanuel Korir, Hansle Parchment and Karsten Warholm were all beaten.
Periault and Duffy were running shoulder to shoulder but the Frenchwoman pulled away from the Bermudan on the third lap of the run.
