Ukraine's Nations League away match against Switzerland was called off on Tuesday after the visitors were put into quarantine by local health authorities due to a spate of Covid-19 cases.
The Group A4 match in Lucerne was in doubt from the moment Swiss regional health officials declared their decision regarding the Ukraine travelling party.
Three Ukraine players tested positive for the coronavirus on Monday and there were four further positives announced on Tuesday - affecting Ruslan Malinovskiy, Sergei Kryvtsov, Junior Moraes and a member of the coaching staff.
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Kryvtsov and Moraes had previously tested positive for Covid-19 and had antibodies in their system that prevented reinfection, the Ukrainian Football Association (UAF) said.