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Published 14:13 27 Aug 2015 BST

Bolt was in total control form start to finish and powered out of the bend to take a commanding and unassailable lead. In the end he won at something of a canter, crossing the line in 19.55 seconds, with Gatlin trailing at 19.74.
South Africa's Anaso Jobodwana claimed bronze with a national record of 19.87.
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