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100 m butterfly, his last individual event.<unk> 100 m butterfly, his last individual event. After two very close victories in the 100 m butterfly at the 2004 and 2008 Olympics (by 0.04 and 0.01 sec, respectively), in this race Phelps beat Le Clos and Yevgeny Korotyshkin, who tied for silver, by 0.23 sec.