Usain Bolt allays hamstring injury concerns ahead of Rio Olympics

Olympic sprinting legend Usain Bolt insists he has no fitness problems after a recent hamstring injury scare.

The 29-year-old pulled out of the 100m final at the Jamaican Olympic trials, but will race in his first 200m of the season in London on Friday.

Read more: http://www.bbc.com/sport/athletics/36853760