50.

83 at last month's Paris Diamond League meet which lifted her to fifth spot on the all-time list.

'I've done things that a lot of these women haven't done, so that's a power to me when I'm out there.

'Fellow Australian Georgia Griffith ran near the front for much of the other semi before running out of gas in the last 50m and fading to ninth.

Earlier in the day, both of Australia's 4x100m relay teams came up just short in their bids to qualify for the finals.

The women's line-up of Ella Connolly, Bree Masters, Kirstie Edwards, and Torrie Lewis clocked 42.

75 seconds, significantly slower than the flying national record time of 42.

48 they ran at the London Diamond League meet in late July.

Crucially, the squad anchored by Australian individual 100m record holder Lewis finished outside the top three automatic qualifiers in fourth place and the second heat was faster.

The Australian men's 4x100m squad overcame the absence through injury of national 100m champ Sebastian Sultana to lower the national record in the men's heats.

Their time of 38.

12 would have been enough to win the second of the two heats, but unfortunately, they were drawn into the much quicker first one where they finished sixth.

Michelle Jenneke defied a ruptured hamstring tendon to contest the repechage round in the women's 100m hurdles.

She trailed home last in 13.

86—well over a second outside her personal best—but was proud of herself for fronting up after sustaining the injury in a heavy fall during the opening round.

'I knew that making that semi-final and running under 12 seconds missing one of your hamstrings was probably pretty impossible,' the 31-year-old Jenneke said.

'But I just wanted to prove to myself and the rest of Australia that I've got some grit in me and I'm not going to give up easily.

' Jenneke will likely have surgery on the ruptured hamstring when she gets home but remains keen to push on until next year's world championships in Tokyo.

Tokyo Olympics fourth-place getter Peter Bol and national record holder Joseph Deng were run out in the 800m repechage round.

We acknowledge Aboriginal and Torres Strait Islander peoples as the First Australians and Traditional Custodians of the lands where we live, learn, and work.

This service may include material from Agence France-Presse (AFP), APTN, Reuters, AAP, CNN, and the BBC World Service which is copyright and cannot be reproduced.