Olympic tennis champion Belinda Bencic and Tunisian Ons Jabeur have tested positive for COVID-19.
Both said they were fully vaccinated and were experiencing strong symptoms.
Jabeur recently defeated Bencic in the Mubadala World Tennis Championship final.
The news comes after Rafael Nadal announced on Monday he had also tested positive.
"While the timing is not ideal - as I was in the final stages of my preparations for the Australian Open swing - I will make my way to Australia as soon as I am cleared and past the isolation period," Bencic said on Twitter.
Jabeur said she was isolating in Tunisia.
The Australian Open begins on January 17.
— Belinda Bencic (@BelindaBencic) December 21, 2021
Will be back soon! 🙏 pic.twitter.com/iJCktGQ1VT
— Ons Jabeur (@Ons_Jabeur) December 21, 2021
Starc leads the way with career-best bowling on Ashes opening day
Leclerc fastest for Ferrari in first Las Vegas GP practice
Spain, Germany stage Davis Cup comeback wins to set up semi-final clash
Italy face Northern Ireland in European playoffs, Sweden meet Ukraine
PSG defender Hakimi wins African Footballer of the Year
