Serena Williams has pulled out of the Yarra Valley Classic due to a right shoulder injury.
Williams, the winner of 23 Grand Slam singles titles, had set up a mouth-watering semi-final clash against world number one Australian Ash Barty after defeating fellow American Danielle Collins 6-2 4-6 (10-6) on Margaret Court Arena.
"Serena Williams has withdrawn from the Yarra Valley Classic singles draw due to a right shoulder injury," the women's tour said on Twitter.
Croft 'deeply shocked by the viciousness' of social media abuse
"Ashleigh Barty advances to the final by walkover."
The Australian Open is live on Eurosport. Watch every match live and ad-free on the Eurosport app and eurosport.co.uk. You can download the Eurosport app for iOS and Android now.
‘She's used her voice in the most powerful way possible’ – Boulter on Osaka
Patience or power - How does Rublev make the next step?