Álvarez has been in a state of tension with the club due to the uncertainty surrounding his future. He had not trained with the group since Wednesday. The 25-year-old forward has made it clear to Atlético Madrid that he wants to leave the club to join Barcelona, but the Madrid-based team has refused to negotiate with their rivals.

Globo Esporte Futebol reports that Arsenal has emerged as a potential suitor for Álvarez, who has until next Tuesday to resolve his future when the transfer window closes in Europe's top leagues.