It is midfielder Denis Vavro who has tested positive for covid-19.
Vavro, who sat on the bench against Poland, is now in quarantine.
- We did tests yesterday and got back two positive results.
They have been isolated and we are working together with Russian health authorities and UEFA to follow the protocol and take every step to prevent further infection, says national team captain Stefan Tarkovic.
Vavro should not have had any symptoms.
- He's okay.
He was tested positive and is in quarantine but no problems with health in general, says Tarkovic.