Usain Bolt has revealed that he is confident of defending his 200m Olympic title in London tomorrow night.

The Jamaican sprinter, who won gold in the 100m on Sunday night, eased into the final with a victory during one of tonight's semi-finals.

However, numerous pundits have questioned the 25-year-old's fitness, while some also believe that his compatriot Yohan Blake will beat him to the top prize.

"I'm ready, this is my favourite event and I'm looking forward to it," he told BBC Sport. "People always doubt the champion but I know what I can do and I don't doubt myself."

Bolt is currently the world record holder over 200m.