After wins in their respective heats, defending silver medallist Joseph Batangdon and defending bronze medallist Dominic Demeritte return to tomorrow's final aiming to each move up a notch - or two.
Batangdon, from Cameroon, claimed a narrow 20.86-20.87 win over Marcin Urbas of Poland in he first semi, while Swedish national record holder, Johan Wissman won the second with a relaxed 20.72 over Tobias Unger's 20.87.
Bahamian Demeritte won the third in 20.75, nearly two-tenths of a second clear of US champion Jimmie Hackley (20.94).
Notable non-qualifers included the lone Briton in the semis, Allyn Condon (20.89), and second American Coby Miller, who, slowed by back pains sustained in weight training earlier this week, finished last in heat 1 in 21.95. 1999 World Champion and world record holder Frank Fredericks did not start.