On the track, Trinidad and Tobago's Jehue Gordon edged American Michael Tinsley in Thursday's 400-meter hurdle final in a finish reminiscent of the women's 400m three days earlier.
In the latter race, Britain's Christine Ohuruogu chased down Botswana's Amantle Montsho and won by four-thousandth of a second.
Gordon's margin of victory was a little greater but not by much -- 47.69 seconds compared to 49.70.
Felix Sanchez, the 36-year-old from the Dominican Republic who was seeking his third title, came fifth.
Kenya's Ezekiel Kemboi claimed his third consecutive world title in the 3,000-meter steeplechase -- adding to his two Olympic gold medals -- with a time of eight minutes, 6.01 seconds.
Had there been 10 more meters, he might have been caught by younger countryman Conseslus Kipruto but Kipruto had to settle for the silver.