Portugal and Juventus superstar Cristiano Ronaldo was said to be "fine and sunbathing" on Tuesday after testing positive for coronavirus which has ruled him out of a midweek Nations League fixture with his country.
Ronaldo "is asymptomatic" and "will not play against Sweden" in Wednesday's Nations League match, the Portuguese Football Federation said on its website.
The five-time Ballon d'Or winner watched his Portugal teammates from a balcony at their training ground in Lisbon on as they prepared for Wednesday's League A Group 3 match.
The federation added that the rest of the Portugal squad were "all negative" after tests on Tuesday morning.
"We have respected all the health measures ... and yet it happened," Portugal coach Fernando Santos told a press conference. "We have been doing tests every day."
Ronaldo played in the goalless draw against France on Sunday. No French players have reported positive tests.
Juventus defender Giorgio Chiellini said he had spoken to Ronaldo.
"He's fine and was sunbathing, he'll be back when he's ready," he reported.
Ronaldo, 35, has scored 101 goals for Portugal and will be a huge absence for his team against Sweden as they aim to hold on to top spot in their group.
Portugal are level with France on seven points from three matches while Sweden are yet to register a point.
Ronaldo is now set to miss Juve's Serie A trip to Crotone on Saturday and their Champions League group stage opening game away to Dynamo Kiev next Tuesday.
He is also a doubt for Juventus' match with Barcelona on October 28, which was set to was set go head-to-head once again with his old rival Lionel Messi.
Ronaldo in action in France stalemate
Juventus' US midfielder Weston McKennie has also tested positive for coronavirus sending the Italian champions back into isolation.
"During the checks provided for by the protocol in force, Weston McKennie has tested positive for Covid-19," Juventus said in a statement, they said the team had gone into isolation on Wednesday evening.
"This procedure will allow all persons negative to the controls to carry out regular training and match activities, but will not allow contact with people outside of the group."
The entire Juventus squad was already isolating after two positive cases among non-playing staff on October 3, a procedure that did not prevent them from training or playing, but prohibits contact with the outside.
Italian health regulations stipulate that the two positive players must remain in self-isolation for at least ten days and test negative before rejoining their teammates.
Under Uefa rules a player must provide evidence that he is no longer sick a week before a European match.