Usain Bolt: "This is my time"

Usain Bolt has fired a warning to his sprint rivals that he believes London 2012 will cement his place amongst Olympic legends.

Bolt is hoping to become the first man to defend the Olympic 100m and 200m titles and has no doubt in his ability to achieve that goal.

"A lot of legends, a lot of people, have come before me," Bolt told The Guardian. "But this is my time.

"This will be the moment, and this will be the year, when I set myself apart from all the other athletes in the world."

The 25-year-old will begin his quest for sprint glory in London with the 100m heats on August 4.