Shakhtar Donetsk announced that Viktor Kornienko has tested positive for COVID-19 on the eve of their Europa League match with Roma.
The second leg of the Round of 16 kicks off in Kiev on Thursday at 17.55 GMT.
The Giallorossi won the first leg 3-0 on home turf.
A statement from Shakhtar Donetsk confirmed defender Kornienko had tested positive for the Coronavirus.
All the other Shakhtar players are currently negative.