This is the stage he has already reached as an athlete, he is competing against himself more than the field. He is chasing records as much as titles. In perfect conditions in Perth (31 degrees), he ran 20.21s for the heat – virtually jogging the last 60 metres once he realised he had safeguarded a place in the finals. As a 16-year-old at the schoolboys championships in Queensland in December, he broke Peter Norman’s 200m record that had stood since the Mexico Olympics in 1968. News, results and expert analysis from the weekend of sport sent every Monday. Sign up for our Sport newsletter.