26 July 2012 Last updated at 21:50

Usain Bolt ready to defend titles despite being only 95% fit

Olympic 100m and 200m champion Usain Bolt says he has overcome back and hamstring problems and is ready to defend his Olympic titles.

The Jamaican tells BBC Sport's David Bond that despite not being 100% fit, he is confident he can retain his titles and secure his legacy in London.

Bolt was speaking four years to the day since he smashed the 100m world record at the 2008 Beijing Games with a time of 9.69 seconds, despite slowing to celebrate before the finishing line.