Serena Williams withdraws from Charleston event

Serena Williams withdraws from Charleston event
Serena Williams has withdrawn from the Family Circle Cup because of the left knee injury that has sidelined her since she won the Australian Open. The green clay tournament begins this weekend and will be played without three of the world’s top 30 women’s tennis players. Top-ranked Williams, 2009 champion Sabine Lisicki, and three-time Grand Slam winner Maria Sharapova also pulled out…

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