Serena Williams pulled out of the Yarra Valley Classic on Friday with a right shoulder injury, few hours after her quarter-final victory in the Australian Open tuneup event.
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"Serena Williams has withdrawn from the Yarra Valley Classic singles draw due to a right shoulder injury," the women's tour said on Twitter.
"Ashleigh Barty advances to the final by walkover."
Dalic named UAE coach after leaving Croatia
Messi doubts playing 'for much longer' after father's death
Italy's Curtis takes 50m backstroke world record
Rybakina fights back to beat Osaka at Canadian Open
