Los Rojiblancos announced that two members of their traveling party have tested positive for COVID-19.

Atletico Madrid have been rocked with terrible news as the club have confirmed two coronavirus cases after arriving in Lisbon for the Champions League. This comes just days before their highly-anticipated showdown with German giants RB Leipzig.

The Spanish heavyweights have made the trip to Portugal to resume their European campaign. Simeone’s men are set to do battle with the Bundesliga heavyweights. The two sides are set to face off on Thursday, kicking off the last eight, and given that the remaining matches will be held in one-off format, the first semi-finalist will be decided that same day.

However, the latest update threatens to derail things. As of now, it remains unclear who the two confirmed cases are and whether they are players or staff. What is known is that they are members of the traveling party when the club left Madrid for Lisbon and are now in self isolation.

"Yesterday, [on] Saturday 8 August, all members of the first team and the club's traveling party [set to head] to Lisbon underwent PCR tests at the Ciudad Deportiva de Majadahonda as required by UEFA protocol, [in order] to participate in the quarterfinals of the Champions League," Atletico confirmed in a statement.

"Among the results known today, two positives have appeared. Both individuals are isolated in their respective homes, and their results were immediately communicated to the Spanish and Portuguese health authorities, UEFA, the Royal Spanish Football Federation, the Portuguese Federation and the Higher Sports Council.

"The corresponding action protocol foreseen for these cases has been activated, which requires new PCR tests to be carried out on the first team and members of the expedition to Lisbon and the closest contacts of the positive cases.

"These tests will result in changes to training schedules, and in the structure and development of travel and accommodation in the Portuguese capital.

"The club will coordinate the new schedules with UEFA and as soon as there is a new plan, it will be made public. We request the utmost respect for the preservation of the identity of the two positive cases."

Clarification should come in the following days as to whether the game will have to be postponed or not. Having eliminated Liverpool in the round of 16, the rested Atletico side were heading into this tie with much confidence but this latest development could complicate things for Los Rojiblancos.