Costa’s battle with hamstring injuries have limited his appearances for the reigning European champions.
But the former Atletico Madrid star looks set to lead the line for for Vicente del Bosque’s side against Slovakia.
And Cazorla insists that his Premier League rival is raring to go.
He said: “I speak to Diego a lot and he says he’s feeling great.
“On other occasions when he’s come to the Spain squad with injuries he has not been in his best physical condition.