Defending champions Canada, however, failed to make it through from their semi-final on Friday. Given their extraordinary depth and quality, the U.S. men have a woeful recent record in the event. They have not won an Olympic final since 2000 and have just one gold from the last seven World Championships amid a series of fumbles and disqualifications. Olympic champions Italy, with Tokyo individual gold medallist Lamont Marcell Jacobs running a barnstorming second leg, were impressive winners of the second heat in 37.65. South Africa finished second, with Britain overhauling Canada on the last leg for the third automatic qualifying spot as the holders failed to make the final.

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Persons: Christian Coleman, Fred Kerley, Brandon Carnes, JT Smith, Noah Lyles, Smith, Rohan Watson, Coleman, We're, Lamont Marcell Jacobs, Briana Williams, Elaine Thompson, Shashales Forbes, Ann Fraser, Pryce, Sha'Carrie Richardson, Shericka Jackson, Mitch Phillips, Ken Ferris Organizations: Canada, U.S, Italy, South Africa, Olympic, Ivory, Saturday's, Thomson Locations: BUDAPEST, United States, Jamaica, U.S, Japan, Tokyo, Canada, Ivory Coast, Italy