Chambers in sizzling form

Chambers had earlier posted a time of 10.14secs in the heats at the German meeting, easily beating the required time to qualify him for Beijing of 10.21.

The 30-year-old returned an hour later to produce another storming performance in the final, blazing out of the blocks to pull away from his rivals in a world-class time.

That clocking matched the time he achieved when returning from his two- year drug suspension in 2006.