Australian golfing great Greg Norman has been hospitalised in the United States showing COVID-19 symptoms.
Norman, whose two major titles came at the British Open in 1986 and 1993, had earlier tested negative for the novel coronavirus but on Friday he posted a picture on social media of him wearing a mask and lying on a hospital bed.
A day earlier he had said he was experiencing mild symptoms that were "potentially COVID".
"I feel very flu-like, I have a mild fever, I have cough, I have aches and pains, I have a mild headache, so I am in self quarantine," the 65-year-old had said on Thursday.
His son, also named Greg, confirmed on his social media account that he and his wife had tested positive for COVID-19 and were isolating at home.
Norman and his son had played together at last week's exhibition PNC Championship in Orlando, Florida.
World number two Iga Swiatek advanced to the second round of the Australian Open on Monday with an unconvincing 6-3 6-4 win against first-time opponent Katerina Siniakova on John Cain Arena.
Jannik Sinner launched his Australian Open title defence with a 7-6 7-6 6-1 win over Nicolas Jarry on Monday in a match that put the players' contrasting doping cases in the spotlight, while Carlos Alcaraz began his bid to complete a career Grand Slam with a 6-1 7-5 6-1 win over Kazakh Alexander Shevchenko.
Manchester United boss Ruben Amorim said his team are still improving, as Sunday's dramatic FA Cup penalty shootout victory over Arsenal points to a more positive future after a difficult start to life at Old Trafford.