Usain Bolt: I'm shocked at the level of doping in athletics
Will Usain Bolt win?
There is no doubt that Bolt is the romantic choice and the fan favourite for the event. The legendary Jamaican is aiming for a third-successive gold medal - and indeed what would be a stunning and unprecedented 'triple triple' if he can triumph in the 100m, 200m and 4x100m relay.
However, Bolt has had an injury scare with his hamstring and Justin Gatlin poses a very real threat yet again for usurping him on the biggest stage of all.
Usain Bolt selected for Rio despite hamstring complaint
What are the odds?
Usain Bolt (JAM) - 8/13
Justin Gatlin (USA) - 6/4
Yohan Blake (JAM) - 8/1
Trayvon Bromell (USA) - 10/1
Andre De Grasse (CAN) - 14/1
Jimmy Vicault (FRA) - 16/1
Marvin Bracy (USA) - 40/1
Nickel Ashmeade (JAM) - 50/1
Femi Ogunode (QAT) - 50/1
James Ellington (GBR) - 60/1
Usain Bolt of Jamaica poses for photographers after winning the men's 200 metres final in Beijing
Image credit: Reuters
What is the current 100m world record?
Bolt set the current world record of 9.58 seconds at the 2009 World Championships in Berlin after smashing it at the Olympics in Beijing the year before with a time of 9.69 seconds.