Usain Bolt was only allowed to run in 100-metre events after winning bet with coach Glen Mills
Twelve months before redefining the 100m sprint at the Beijing Olympics, Usain Bolt had to convince his coach, Glen Mills, to let him run in the event by winning a bet.
SPORTbible2d
What happened to the four sprinters Usain Bolt tipped to challenge him back in 2012
Usain Bolt claimed that four sprinters could challenge him back in 2012 - and they have all had different careers.