Madison Keys to miss Australian Open after positive COVID-19 test

Keys, currently No. 16 in the official WTA rankings, added that she hopes to resume play at some point next month.

The 25-year-old made the semifinal round of the event that serves as the first Grand Slam of the tennis season in 2015, her furthest journey in any Australian Open. She fell to Maria Sakkari in straight sets in the third round of last year's tournament. 

Keys played in the 2017 US Open Final but lost to good friend and fellow American Sloane Stephens. Stephens announced via Twitter on Thursday that both her grandmother and aunt recently died due to complications caused by COVID-19. 

Also on Thursday, the Australian Open confirmed that Andy Murray could miss the tournament after testing positive for the coronavirus. The three-time Grand Slam champion is isolating at his home and may not be cleared in time to complete the required quarantine period to play in Australia.