Powell knows he will have to do even better to challenge Jamaica 's world record holder Usain Bolt and Tyson Gay of the US but he was confident he is up to the task .
The US both have minor injuries at the moment .
Powell knows he will have to do even better to challenge Jamaica 's world record holder Usain Bolt and Tyson Gay of the US , who both have minor injuries at the moment , but he was confident he is up to the task .