The league said those who tested positive will self-isolate for 10 days.
Jurgen Klopp says scheduling of Champions League matches is putting a strain on players and causing injuries.
Russian Medvedev, who has won nine matches in a row, beats Spanish Nadal, world number two, 3-6, 7-6 (7/4), 6-3 during their ATP semi final match.
FIFA's independent Ethics Committee ruled that 73-year-old Yves Jean-Bart was found guilty of having abused his position and having sexually harassed and abused various female players, including minors.
Spain's Rafael Nadal advanced to the semifinals at the ATP Finals for the first time in five years after knocking out the defending champion Stefanos Tsitsipas.
The Borussia Dortmund striker is likely to make his debut against Hertha Berlin on Saturday after celebrating his 16th birthday the day before. If he plays, Moukoko will be the youngest player in the league's history.
Egyptian football players Mohamed Salah and Mohamed Elneny are the latest Premier League players to test positive for Covid-19, EFA said.
Ferran Torres scored a hat-trick in a 6-0 win for Spain, which now heads to the semifinals as group winner after inflicting the heaviest loss for Germany in 89 years.
FIFA did not state if supporters would be able to attend any of the games.
Turkey defeat Russia 3-2 remaining in third place with six points in its group, and Italy beats Poland 2-0 despite absence of several players and coach Roberto Mancini who tested positive for coronavirus.
Mercedes driver Lewis Hamilton wins 7th Formula One championship to equal Michael Schumacher's record, with three races of season remaining.
France defeats European champions Portugal, Germany wins over Ukraine and Spain draws with Switzerland while Covid-19 shadows the UEFA Nations League after some coaches and players test positive for coronavirus.
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