"10-Second barrier" . "to break 10 seconds" . "sub-10 second" . . "10 seconds" . . . "10 second club" . . "sub-10-second" . "under 10 seconds" . "10-second barrier" . "10-second barrier in the 100 metres outdoor" . "less than 10 seconds" . "sub-10 run" . . "sub-10" . . "10-second barrier" . "sub-10 second sprinter" . "break 10 seconds" . "sub-10 second run" . "sub-10 second club" . "run under ten seconds" . "run under 10 seconds" . "ten seconds for the 100 metres" . "sub-10-second club" . . "below 10 seconds" . "10-second 100-metre" . "four fastest men in history" .