Nick Kyrgios could miss the Australian Open after testing positive for Covid-19 a week before his home grand slam.
The 26-year-old withdrew from the Sydney Tennis Classic on Monday and used social media to reveal his positive test.
"Hey everyone, I just want to be open and transparent with everyone, the reason I have had to pull out of Sydney is because I tested positive for Covid," he wrote on an Instagram story.
"I am feeling healthy at the moment with no symptoms. I wish everyone all the best and to stay safe where you can. If all goes well I will see you at the Australian Open."
Last week the world number 114 had withdrawn from the Melbourne Summer Set, saying an illness had sparked asthma issues, but added that a number of Covid-19 tests in the preceding days had been negative.
With the Australian Open due to begin on January 17, Kyrgios has only a few days to recover and be cleared to return. He has not played competitively since September.