The 35-year-old, the top scorer throughout the entire existence of the opposition with 130 goals, expected to test negative 24 hours before the game against his extraordinary opponent Lionel Messi's Spanish group.
An irate Ronaldo posted a photograph on Instagram, with the remark: "Feeling better and solid! Forza Juve! #finoallafine."
He included a remark the swab tests used to distinguish the infection: "PCR IS B*****IT".
Ronaldo, who has in excess of 241 million Instagram devotees, later eliminated that remark.
Ronaldo initially tried positive for Covid-19 fourteen days back while playing with Portugal, and has been in self-separation since getting back to Italy.
As indicated by Portuguese TV1, the five-time Ballon d'Or champ has tried positive multiple times.
The match against Barcelona, which commences at 2000 GMT, will be the fourth missed by Ronaldo, who has no indications of the infection, and has posted photographs of himself preparing via online media.
Footballing legends Ronaldo and Messi will now, all being great, meet in the converse Group G apparatus in Barcelona on December 8.
They have not gone head to head since the Portuguese hotshot left Real Madrid for Juventus in 2018.