The row between Jose Mourinho and Spain over Diego Costa has taken a twist after the national team doctor claimed the striker did not suffer a new injury on international duty.

Costa has been left out of the Chelsea squad since playing twice for Spain earlier this month.

Mourinho insisted Costa, who has been supposedly struggling with a hamstring problem, “came back in conditions where he’s not available to play for his club.”

However, Spain’s doctor Juan Jose Garcia Cota told IBTimes UK: “This time he [Costa] didn’t say anything about the hamstring. When Costa arrived to the international team he said to us he had a minor hassle in the groin but that it was nothing important.

“He probably had played with it before for Chelsea and he didn’t complain any more about it during the international duty.

“He was treated by the physios [like every other player] and didn’t have any limitations when doing exercises.

“I wouldn’t even say it was an injury or a problem. It was a very minor hassle that is very common in every professional footballer. He didn’t even ask for treatment and didn’t require a scan or anything similar.”

Costa was substituted in the 82nd minute of the second Euro qualifier against Luxembourg two weeks ago.

But Garcia Cota added: “He was replaced in the second half just because he had already scored.

“Indeed, after the game, I sent a medical report to Chelsea, stating that he had arrived to the national team with a very minor hassle in the groin but that he hadn’t got anything new.

“Costa himself didn’t give it any importance.”

Mourinho denied Costa had a groin problem when asked last week, although did reveal he had gone to hospital with a virus.