American Trell Kimmons out-sprinted former 100-metre world record-holder Asafa Powell of Jamaica for the 60-metre title at the Boston Indoor Grand Prix athletics meet.
Kimmons, the second-slowest qualifier for the final, surged from the start and edged past his rivals at the finish line to win in 6.51 seconds, Xinhua reported Saturday.
Powell, a world and Olympic 4x100 relay champion, finished second in 6.52 and American Michael Rodgers, the 2010 world 60 metre runner-up, came third at 6.53.
A US indoor and outdoor sprint runner-up Kimmons, who took Olympic silver in the 4x100 relay in London, will race next week in New York at the Millrose Games and then rest until the outdoor season.
Powell, who owned the world record from 2005 until 2008, when Usain Bolt broke the mark. The former tested positive for a banned substance in 2013 and his ban ended only last year.
Trinidad and Tobago's Michelle-Lee Ahye won the women's 60 metre crown in 7.15, edging American Tianna Bartoletta, a two-time world long jump champion, by 0.04 of a second with Ghana's Flings Owusu-Agyapong coming in at third in 7.26.
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