Melissa Jefferson-Wooden became the first woman since Jamaican legend Shelly-Ann Fraser-Pryce in 2013 to achieve the world sprint double after easing to victory in the 200 metres on Friday.

The 24-year-old American timed 21.68sec in a clear victory with Briton Amy Hunt an impressive second in 22.14sec while two-time defending champion Shericka Jackson of Jamaica was third in a time of 22.18sec.

"To be able to win the double is amazing," said Jefferson-Wooden.

"The last one to do so was Shelly-Ann, it speaks volumes.

"Not a lot of women double anymore, so for me to come here, do the double and win gold medals just says a lot."

Jefferson-Wooden's victory was also the first by an American since Allyson Felix won the third of her titles in Berlin in 2009, an achievement she said "means a

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