Mohamed Salah has tested positive for COVID-19.
The Liverpool forward is currently on international duty with Egypt.
The Egyptian FA confirmed the news on Friday afternoon. They say Salah is asymptomatic, and all other squad members have tested negative.
He'll now miss Egypt's Africa Cup of Nations qualifiers with Togo this week.
It's the latest blow to Liverpool's Premier League title defence, which has been dogged by injuries and coronavirus infections so far.
Defenders Virgil Van Dijk and Joe Gomez are long-term absentees with serious knee injuries.
While Sadio Mane and Thiago Alcantara have already tested positive for COVID-19 this season.
Salah had been busy prior to Egypt's double-header with Togo.
He was filmed celebrating his brother Nasr's wedding, without wearing a mask in a busy room.
Football Star of Egypt and Liverpool Mo Salah celebrates the wedding of his brother, Nasr.#EgyptToday #Egypt @MoSalah #MoSalah #Liverpool @mosalah #Mohamedsalah @LFCTransferRoom @empireofthekop | #محمد_صلاح pic.twitter.com/GIMliRMDnq
— Egypt Today Magazine (@EgyptTodayMag) November 11, 2020
While on Wednesday, the Egyptian FA held a special ceremony honouring the 28-year old.
Salah is due to undergo further checks under the supervision of Egyptian team doctor Muhammad Abu Al-Ola in consultation with Liverpool.
He is isolating in his room, as are all close contacts.
Liverpool's next game is in eight-days' time at home to Leicester City.