Sabalenka, who was set to face American Emina Bektas, was replaced in the draw by Russian Erika Andreeva, while fellow Belarusian Azarenka's spot was taken up by another lucky loser in Frenchwoman Elsa Jacquemot.
Dayana Yastremska upset of twice former champion and 18th seed Victoria Azarenka.
IMAGES from the action from the Australian Open at Melbourne Park on Thursday.
American Sloane Stephens battled back to defeat defending champion Caroline Garcia at the Cincinnati Open.
Elena Rybakina stormed to her first Australian Open final with a 7-6(4), 6-3 win over Victoria Azarenka on Thursday, wearing the twice champion down in a cagey first set before dominating to close out the match.
Victoria Azarenka rolled back the years at the Australian Open on Tuesday as the two-times champion crushed third seed Jessica Pegula to reach the semi-finals.
World No. 1 Victoria Azarenka and Maria Sharapova stayed on track for a mouth-watering showdown in the final of the Indian Wells WTA tournament while defending champion Caroline Wozniacki was beaten by Ana Ivanovic on Tuesday.
World number one Victoria Azarenka stretched her unbeaten run to 24 matches this year while Venus Williams ousted Wimbledon champion Petra Kvitova at the Sony Ericsson Open in Miami on Friday.
The tournament initiative was to launch on Wednesday - Ukraine Independence Day - with the exhibition event at Louis Armstrong Stadium
Former world number one Victoria Azarenka was forced out of the Aegon Classic in Birmingham with a foot injury on Wednesday shortly after defending champion Ana Ivanovic suffered a shock defeat.
'This has been an emotional week and I want to thank everyone for the outpouring of support.'
Images from Day 8 of the 2021 French Open at Roland Garros in Paris on Sunday
Images from Day 1 of the 2020 French Open, in Paris, on Sunday.
Images from the action on Day 2 at the Australian Open.