Chelsea striker, Diego Costa, has said that he made a huge mistake by attempting to toss his bib at coach, Jose Mourinho at the White Hart Lane. The Spanish player said himself and the coach had since moved on and enjoy a healthy relationship. He said the incident was based on impulse. He also said his Euro 2016 hopes with Spain requires him to work hard and be at a top level to be selected. The striker has scored a dismal four goals for the Blues in 18 games this season.