“It is very clear that it was not my fault that I was in Brazil,” Costa said in a press conference in Spain today.
“We all know what happened there but I’m back now and I want to do my best”.
The Spanish forward has also urged Atletico team-mate Antoine Griezmann to stay with the Madrid club amid interest from Barcelona and Manchester United.
“Griezmann is still with us and I hope that he stays. He still hasn’t told me if he’s going but he knows how important he is for the club.
“I can’t interfere with his decision. I will be happy if he stays but everyone has to do what they think is right for them. He has to do what is best but I think the best for him is to stay.”