Allyson Felix produced a memorable performance to claim gold in the women's 400m final at the World Athletics Championships this afternoon.
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The American was the favourite going into the race and went flying out of the blocks, overtaking Great Britain's Christine Ohuruogu on her outside within the opening 100m.
No-one was able to get close to Felix, who crossed the line in a personal best and world-leading time of 49.26s to claim her maiden solo 400m gold and her ninth world title overall in style.
Defending champion Ohuruogu, bidding for a third world title over the distance, tried to respond to Felix's quick start, but tired on the final straight and ended up finishing in last place with a time of 50.63s.
All of the top four produced personal-best times, but it was Shaunae Miller of the Bahamas and Jamaica's Shericka Jackson who made up the podium with silver and bronze respectively.