Liverpool midfielder Thiago Alcantara is self-isolating after testing positive for the COVID-19.
The Spanish international missed the League Cup win at Lincoln last week and was also absent for the Premier League champions' 3-1 victory over Arsenal on Monday.
The 29-year-old only recently signed for The Reds from German side Bayern Munich and made his debut as a substitute in a 2-0 win at Chelsea.
Liverpool said Thiago "has exhibited minor symptoms of the virus but is in good health and is getting better".
A statement on the club's website added: "The club has, and will continue to follow, all protocols relating to COVID-19 and Thiago will remain in self-isolation for the required period of time."
On Monday, the Premier League announced that 10 people had tested positive for coronavirus in the latest round of testing - the highest number of positive tests since the season began.
Fourteen-time French Open champion Rafa Nadal said there was still a chance this year's tournament in Paris may not be his last in comments ahead of his tough opener against fourth seed Alexander Zverev.
Outgoing Barcelona manager Xavi Hernandez said he was proud of his achievements with the club and was looking forward to being a fan again as he prepares to coach his final game against Sevilla.
World number one Novak Djokovic does not consider himself a favourite ahead of his title defence at the French Open, which begins with a first-round match against local hope Pierre-Hugues Herbert on Sunday.
Real Madrid midfielder Aurelien Tchouameni will miss the Champions League final due to a foot injury and could be a doubt for the European Championship, Real manager Carlo Ancelotti said on Friday.