Bolt's fitness concerns

ATHLETICS: Olympic sprint champion Usain Bolt admits he will not be fully fit when he faces Asafa Powell and Tyson Gay at next month&rsquo;s World Championships in Berlin.<br /><br />Bolt, who won 100m and 200m Olympic gold last summer, and fellow Jamaican Powell will warm up by competing at the London Grand Prix at Crystal Palace on Friday. He said: &ldquo;I&rsquo;m not sure I will be 100 per cent in Berlin, but if I&rsquo;m 95 per cent I&rsquo;ll be in contention.&rdquo;