Real Madrid announced on Friday that coach Zinedine Zidane has tested positive for COVID-19.
Zidane took part in Thursday's training session but did not take part in this morning's session ahead of Saturday's La Liga game at Alaves.
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A club statement said: "Real Madrid announces its coach Zinedine Zidane has tested positive for COVID-19."
He will have to isolate for at least 10 days and will only be able to join the team once he has a negative test.
Madrid did not reveal whether Zidane in asymptomatic.
Zidane was on the bench in Madrid's shocking 2-1 extra-time loss at Alcoyano that saw the team eliminated in the round of 32 of the Copa del Rey.
Earlier this month, Zidane, 48, had to isolate as a precaution after a member of his entourage tested positive for COVID-19 but tested negative then.
Source: espn.co.uk