Wayde van Niekerk ran the fastest single lap in history to win the Olympic 400 metres gold medal in 43.03 seconds and break Michael Johnson's 17-year-old world record.
Running an extraordinary race in lane eight, the 24-year-old world champion got off to a flier and was streaking clear on the back straight before upping his pace even further to better American Johnson's 1999 mark of 43.18 seconds.
Reuters