Costa will not be able to play again this season as he was handed an eight-match ban for his comments towards referee during their defeat to Barcelona in La Liga. As reported by AS, the former Chelsea man faces internal action from the Spanish side for the sending off and that has led to him refusing to take part in the training.
The 30-year-old was at the club's training ground on Thursday and despite the club confirming he is not injured, he did not take part in the training session. Sportsmail understands that Costa is unhappy that the club have not defended him over the eight-game ban, and also that Atletico has opened a separate case against him.
See also: Costa handed eight-match ban
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