Atletico Madrid have reached the Champions League final twice in the last six years - losing both to Real Madrid.
On Thursday, they will face Emil Forsberg's RB Leipzig in the quarterfinals, but something other than sports is in focus.
The club announces that two people who were to travel to Lisbon have tested positive for covid-19.
It is not clear if it is a player or leader, but everyone who went there will be tested again tomorrow.
Postponing the match is not likely, but Atletico will contact Uefa as they may be forced to reschedule their travel plans.
Diego Simeone's men finished third in La Liga, twelve points behind Barcelona and seventeen behind the winners Real.