Diego Costa has described his treatment by Chelsea like that of a “criminal” and confirmed he wants to join Atletico Madrid.
The striker, 28, last played for Chelsea in the FA Cup final in May, and was sent a text in June by boss Antonio Conte telling him he would not be part of the squad for next season.
Costa says the club are now demanding he return to train with the reserves.
“Why won’t they let me go if they don’t want me?” he told the Daily Mail.
“I have to do what I have to do. I have to think of myself. I’ve been a good boy here and tried to do the right thing. My desire is to go to Atletico.”
Costa joined Chelsea from Atletico Madrid in 2014 and has won two Premier League titles and the League Cup with the London club.
In January, he was left out of the Chelsea side for an away match at Leicester after he was involved in a dispute with a fitness coach.