Usain Bolt has won the 200 m title .
An eight-time Olympic gold medalist , Bolt won the 100m , 400m , and 4 × 100m relay at three consecutive Olympic Games , although he subsequently lost one of the gold medals , as well as the world record set therein , nine years after the fact due to teammate Nesta Carter 's disqualification for doping offenses .
Usain Bolt