Usain Bolt has pulled out of the final race before the London Olympics due to injury.

The 100m and 200m world record holder had been scheduled to race in the Diamond League in Monaco, but his next race will now be at the Games.

Bolt described his injury as a "slight concern", but insisted that he will be in London to defend his titles.

There has been debate as to whether or not Bolt is still favourite to clinch a gold medal in either event in the Olympics, with training partner Yohan Blake considered to be a major threat.

Blake beat Bolt in both the 100m and 200m at the recent Jamaican National Championships and Olympic trials.