With two silver medals from her last three global finals, former world record-holder Kendra Harrison laid down a big marker in the heats of the women’s 100m hurdles, which was the first event of the evening.
The US athlete ran an impeccable race, gliding over the barriers smoothly and stopping the clock in a world lead of 12.24 – equalling her second-fastest time ever.
Bahamian Devynne Charlton set a national record of 12.44 in second while 2015 world champion Danielle Williams, who clattered the final hurdle, recovered quickly to cross the line in third.
Other big names dominated their respective races. US champion Nia Ali enjoyed a brilliant start to take heat two in 12.55, with European gold medallist Pia Skrzyszowska following in 12.65.
Olympic champion Jasmine Camacho-Quinn took her unbeaten run this year to 12 out of 12 races, running a smooth race from lane nine to win heat four in 12.50, while world record-holder Tobi Amusan won heat five in 12.48.
NCAA gold medallist Ackera Nugent took the win in heat one from USA’s Masai Russell, though both athletes clocked an identical time of 12.60.