A player who has just returned to professional football for more than six months is heading for Spain in the 2018 World Cup. It is Diego Costa and his journey to find his true self. Diego Costa: Weight loss, hard work to change destiny World Cup 2018 schedule Last summer, Costa enjoyed a sunbathing beach in Brazil, but could not escape the prospect of a dream. He can not leave Chelsea, so can not return to Atletico? No, Costa has been out of mind for a long time, because he'd rather be in Brazil for a year without pay until Chelsea releases. What makes Costa think is the 2018 World Cup: "I need to be in the best shape to prepare for the 2018 World Cup. In 2014, things did not work out right. I was knocked out after the group stage, and next time, I want to prove my ability. " And finally, Costa got what he needed when returning to Atletico last September. At the time, he was eliminated from the roster of La Roja, making way for Alvaro Morata and David Villa. In fa...