Due to an injury, Garay was not part of the Valencia side that travelled to Milan, the epicentre of the pandemic in Europe, for the game against Atalanta on 19 February, while he also missed the return leg at the Mestalla on Tuesday.
The Valencia defender announced the news on Instagram, insisting he was feeling well and recovering in self-isolatation.
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“I’ve tested positive for the coronavirus, I feel great and now all that’s left is to listen to the health authorities. For the moment, I have to be isolated,” said the Argentine.
“I want to tell the workers, the self-employed, and businesses that the government of Spain is going to do everything in its power to cushion the effects of this crisis,” prime minister Pedro Sanchez said on Saturday in a televised address.
“From now we enter into a new phase. We won’t hesitate in doing what we must to beat the virus. We are putting health first.”
All football matches in Spain’s top division, LaLiga, have been suspended for “at least” two weeks over fears of the spread of the coronavirus.
The league announced on Thursday that the decision came after Real Madrid put its squad into quarantine, and that it had notified the clubs, the Spanish soccer federation (RFEF) and the national sports ministry of the postponements.
Real’s move to put its football team into quarantine came after it emerged a basketball player for the club had tested positive for the virus, with the two squads sharing training facilities.
LaLiga will revisit the decision after the next two matchdays have passed, currently scheduled for 13-15 March and 20-22 March, after which tie domestic action is scheduled to stop anyway for an international break.