Usain Bolt won his second gold medal of the Rio Olympics, brushing aside all-comers again in his favourite 200m sprint but failing in his bid to smash his own world record.

Rio 2016: Usain Bolt wins his 8th gold medal with the 200m, Ashton Eaton wins decathlon gold

Usain Bolt won his second gold medal of the Rio Olympics, brushing aside all-comers again in his favourite 200m sprint but failing in his bid to smash his own world record.