"I didn't need to do any more work. I was just enjoying myself," said Bolt.
British duo Dwain Chambers and Tyrone Edgar both qualified for the semis but Simeon Williamson missed out.
Former world record-holder Asafa Powell only just squeezed through his opening heat in third place, when easing up after 60m, but made no mistake in the quarter-finals, setting the fastest time of 9.95. Read more at bbc.co.uk