Juventus teammate Giorgio Chiellini said he had spoken to Ronaldo and "he's fine and was sunbathing, he’ll be back when he’s ready."
But the Portuguese star will be out for at least Juve's next two games -- Saturday's Serie A game at Crotone and the opening Champions
League match at Dynamo Kyev three days later. He will have to self-isolate for 10 days and then receive a negative test before he can return to play.
In September, Mbappe tested positive two days after scoring the only goal in a 1-0 win over Sweden. He missed the next game against Croatia. Pogba missed France's matches in September after his pre-camp COVID test was positive.
Neymar and Paris St. Germain teammates Angel Di Maria and Leandro Paredes all returned positive tests after a trip to Ibiza following PSG's loss to Bayern Munich in the UEFA Champions League final.