Manchester City defender Benjamin Mendy is self-isolating as a precaution after a member of his family was admitted to hospital displaying symptoms of coronavirus.
Mendy (25) trained with his team-mates as normal yesterday, while the Premier League confirmed all games would go ahead this weekend.
"The club is aware that a family member of a senior men's team player is in hospital with symptoms of a respiratory illness," said a City statement.
"He has undergone tests at hospital, one of which is for Covid-19. Until the results are known, the player in question is self-isolating as a precaution."
Three Leicester players have shown symptoms of the coronavirus and are self-isolating as a precaution.
Foxes boss Brendan Rodgers revealed the news in his pre-match press conference ahead of tomorrow's Premier League match at Watford. Leicester subsequently released a statement in which they said the unnamed trio were first-team players who had "presented with extremely mild illness" in recent days.
The club said the players had been advised by the NHS that their symptoms were "consistent with common seasonal illness" and that a seven-day period of self-isolation was appropriate, with there having been no recommendation that further testing would be necessary. Leicester added that the players' symptoms "remain mild and self-manageable".
Rodgers said: "We've had a few players that have shown symptoms and signs (of coronavirus). We've followed procedure and they have been kept away at this moment from the rest of the squad and then we'll see how that develops."
The Ulsterman, who confirmed it was three players involved, added: "This is about health. This is more than football, this is players and their families and children, so any risks that are there for their health and everyone else's, we have to mitigate against that."
The statement on the club's website read: "Leicester City Football Club can confirm that, as a precautionary measure, three members of its first-team squad have undertaken a period of self-isolation following medical advice."