'I didn't take the Rio Olympics seriously': Andre de Grasse determined to inherit Usain Bolt's crown in Tokyo

A skinny 12-year-old boy is standing on the startline of a community track in Ontario, and he looks different to the rest. It's partly because he's the only one wearing a baggy vest over basketball shorts; the chunky trainers stand out a little too in a row of running spikes. Most of all, though, it's that the rest of the field are crouched low in their blocks while he's standing up with knees flexed and arms stiff like an emoji.