He was followed closely by three other competitors also under 10 seconds , making the event the most competitive track event in Olympic history .
In the 100 - meter dash , Justin Gatlin took home the gold medal with a time of 9.85 .
Justin Gatlin was followed closely by three other competitors also under 10 seconds , making the event the most competitive track event in Olympic history .
In the 100 - meter dash , Justin Gatlin took home the gold medal with a time of 9.85 .