The owner of Greece's most successful soccer club Olympiakos and English Championship side Nottingham Forest said on Tuesday he had contracted the coronavirus.
Evangelos Marinakis, a 52-year-old Greek businessman, said he was well and receiving treatment.
"The recent virus has 'visited' me and I felt obliged to let the public know," he said in a social media post. "I feel good as I take all the necessary measures and I discipline to the doctors' instructions.
"I strongly advise all my fellow citizens to do the same. I wish all a quick recovery."
The virus has infected well over 100,000 people worldwide and killed more than 3,000. Greece has several dozen cases but no fatality so far.