Atletico Madrid confirmed via a statement on its website, officially participating in the European Super League, where it will be one of three teams representing Spain next to both Real Madrid and Barcelona, considering the tournament to be "the best club sports competition in the world."
In the statement, the Rojiblancos explained that they had approved joining the 12 founding clubs during a board meeting on Monday.
The clubs participating in this competition are: Milan, Arsenal, Atletico Madrid, Chelsea, Barcelona, Inter Milan, Juventus, Liverpool, Manchester City, Manchester United, Real Madrid, and Tottenham.
The statement added: "Atlético Madrid has reached an agreement with 11 major European clubs to establish a new championship, the Super League, which will be run by founding clubs and stems from the aspiration for the best team-level sporting competition in the world."
The format of the tournament will be based on the participation of 20 teams, the 15 founders of the tournament, as well as 5 clubs that will qualify each year according to their performance, and the mid-week games will be played out of respect for the schedule of domestic tournaments, while the first edition will be launched next August.
The 20 clubs will be divided into two groups, and between them will be back-to-back matches, where the top three will automatically qualify for the quarter-finals, the fourth and fifth place finishers will play a two - game playoff, while the final May will be a one - game game on a neutral pitch.