Cristiano Ronaldo followed Zlatan Ibrahimovic and countless other high-profile footballers in contracting Covid-19, with doubts now cast over his availability for Juventus' upcoming game against Barcelona.
News of Ronaldo's positive coronavirus test result was confirmed on October 13 while he was away on international duty with Portugal and, while the 35-year-old displayed no symptoms, he is now ruled out of action.
Exactly how long he will be unavailable for is unclear, but the Bianconeri will be hoping that he returns sooner rather than later, with a number of crucial games coming up on the domestic and continental fronts.
Will Cristiano Ronaldo be available for Juventus vs Barcelona?
Juventus are hopeful that Ronaldo will be available for Juventus' Champions League clash against Barcelona and his old foe Messi.
However, it will depend on his being Covid-19-free for at least one week before the game, which is due to be played on Wednesday October 28. So that means he must test negative on Wednesday October 21.
The Portugal international will spend a 10-day period in self-isolation, which will bring him up to Friday October 23, and he will be tested during the isolation stint to check his status.
Occasionally, if it is established that a positive test was a 'false positive' - usually if a number of subsequent tests return a negative result - public health authorities may allow an earlier return to action.
Such an outcome, however, will ultimately be decided by UEFA and Italian authorities.
Of course, Ronaldo's potential involvement in the game will also rely on his avoiding any other injuries, which would naturally scupper his chances of playing.