Ricardo Cardoso has threatened legal action and a transfer request after the champions vetoed a loan move to Italian giants AC Milan ahead of a January return to previous club Atletico Madrid, once their transfer ban ends.
Cardoso, said: “We are going to use all legal mechanisms to hold Chelsea accountable for this behaviour, making it possible for Diego Costa to leave.”
Manager Antonio Conte will not have Costa anywhere near his squad, having axed the marksman BY TEXT MESSAGE two months ago.
The Spain international trained alone on a beach in Brazil while the Blues were on a pre-season tour in the Far East.
Cardoso added: “’ He will formally request the transfer .
“When he was with the Spanish national team in June, he was dismissed from Chelsea by Antonio Conte through an SMS message…
“The way in which it was carried out and the fact that it came out in public shows unfair behaviour and a lack of respect for the player and it is inadmissible and inexcusable on Antonio Conte’s part.
“Not only have Chelsea not intervened or denied it either in public or in private, but they have renewed Conte’s contract, demonstrating they agree with the dismissal of Diego Costa and the way in which it was processed.
“This discriminatory behaviour makes it impossible for Diego Costa to return to Chelsea while Antonio Conte is the coach.
“There is no condition for him to continue playing at Chelsea, which has already been passed on to those responsible several times.
“At the moment moment, he does not want to play for a club other than Atletico Madrid.”