The unfortunate development emerged on Sunday when the team was set to depart for Lisbon for top European competition on Sunday. It is not clear whether, those affected were members of the playing or backroom staff.

Goal has learned that two members of Diego Simeone’s squad, however, are responsible for the two positive tests and, as such, will not travel to Portugal or take part in the remainder of the competition.

As per the precaution, now fresh round of Test is underway in the Atleti camp with members and stafd are being inspected for the virus.

Until the results of the latest tests have become clear, Atleti are in a state of limbo. When the outcome is clear, UEFA will advise them on how to proceed for Thursday's scheduled clash against RB Leipzig.

UEFA’s medical protocol indicates that as long as there are 13 available players from the A list, the match will take place, unless quarantine is required for the rest of the squad, although it is the Portuguese government that will have the final say.