Five days after beating Justin Gatlin to win the 100 metres, the 29-year-old Olympic champion and world record holder again proved too strong for in-form American, who finished second in 19.74 seconds.

Anasco Jobodwana took bronze in 19.87 for South Africa.

The victory gave Bolt a record-extending 10th world championship gold medal and he could yet win an 11th as part of Jamaica's 4x100 metre relay team on Saturday.

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