Injured Konta withdraws from Charleston tournament

British number one Johanna Konta has withdrawn from this week's Volvo Car Open in Charleston, South Carolina, citing a right shoulder injury.

Konta, winner of the weekend's Miami Open, would have been the number two seed in the WTA event.

"I was battling a slight shoulder injury and sickness during Miami which has taken hold," Konta said in a statement.

Konta, the world number seven, won the biggest title of her career when she beat Caroline Wozniacki 6-4 6-3 in the Miami final on Saturday.

American Madison Keys is the Charleston event's top seed.

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