A potential dispute is brewing between Barcelona and Atlético. The issue at hand involves Julián Álvarez, an Argentine player. Barcelona's actions regarding Álvarez have been described as "matonismo", which may lead to a complaint from Atlético.

Atlético is considering taking legal action against Barcelona. The reason for this is Barcelona's negotiation with Álvarez while he still has a contract in place. Further details about the situation and the potential complaint are available from El Mundo.

For more information on the potential dispute and the actions being considered by Atlético, readers can refer to the original source.