World 100m champion Lauryn Williams has added her name to a star-studded line-up competing at the Sheffield Grand Prix on 21 August. The American will take on world title favourite Allyson Felix over 200m.
"Sheffield should be a real test," said Williams. "I've got a taste for the big time and can't wait for my next race."
Most of the world's top sprinting talent will be on display at the Don Valley Stadium including world and Olympic 100m champion Justin Gatlin.
Former Olympic champion Maurice Greene, world bronze medallist Kim Collins and Britain's Jason Gardener are already confirmed for the men's sprint.
Olympic 100m champion Yuliya Nesterenko and Olympic 200m champion Veronica Campbell will battle it out over 100m.
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