The unnamed individuals, who are reportedly asymptomatic, are now self-isolating at their respective homes and will not be able to travel to Portugal for the revised conclusion to the tournament.
A statement released by Atletico read: “On Saturday 8 August, all members of the first team and the club’s travelling party to Lisbon took PCR tests in the Ciudad Deportiva de Majadahonda as required by Uefa protocol to participate in the quarter-finals of the Champions League.
“Among the results known today, two positives have appeared, which are isolated in their respective homes, and which were immediately communicated to the Spanish and Portuguese health authorities, Uefa, the Royal Spanish Football Federation, the Portuguese Federation and the Higher Sports Council.
“In addition, the corresponding protocol of action planned for these cases has been activated, which requires the implementation of new PCR tests for the first team and members of the travelling party to Lisbon and to the close contacts of the positive cases, and which motivates changes in the training schedules, in the structure and development of the trip and the 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. It also requests the utmost respect for the identity of the two positive cases.”