The US decathlete has a habit of doing things at least twice over. Not content with breaking Roman Sebrle’s world record in 2012, the undisputed world number one set a new mark of 9,045 points at the 2015 World Championships, landing his second world title. And after scooping a first decathlon gold at London 2012, he successfully defended his title in Rio, becoming only the third athlete to do so, after compatriot Bob Mathias and Great Britain’s Daley Thompson.