The top favorites – including Ayanleh Souleiman of Djibouti plus Americans Nick Symmonds and Duane Solomon – all won their opening heats, with Aman the fastest in 1:44.93. Solomon was number one in the semifinal round, winning in 1:43.87. Aman won the second semi in 1:44.71, while Souleiman and Symmonds ran a near dead-heat in the final semi, with Souleiman prevailing in 1:44.99 to Symmonds' 1:45-flat.
Solomon started fast in the final and led at the bell before Symmonds shot past, followed by Aman and Souleiman. Aman then continued his momentum and moved into first, surged down the home straight and won in 1:43.31. Symmonds held second in 1:43.55 with Souleiman gaining his country's first-ever World Championship medal on the track, in 1:43.76. Solomon dropped to sixth, crossing the line in 1:44.42.
Chepseba led most of the way in the final, with Kiprop close behind, then Centrowitz following Kiprop. Kiprop and Centrowitz burst past Chepseba on the final lap, with Kiprop surging ahead to win in 3:36.28. Centrowitz couldn't match Kiprop's finishing kick, but the American had more in reserve than anyone else and powered into second place in 3:36.78. South Africa's Johan Cronje – who barely qualified for the final after placing fifth in his semi – came through on the inside to take the bronze in 3:36.83, with Chepseba fading a bit to fourth.
Mekhissi-Benabbad opened the competition by winning the fastest heat, in 8:15.43. American Evan Jager, who'd go on to finish fifth in the final, edged Kemboi by .08 in the second heat, finishing in 8:23.76. Kipruto won the third heat in 8:22.31, edging Paul Kipsiele Koech, who then took fourth in the final.
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