Na Li from China serves during a Madrid Open tennis tournament match against Kirsten Flipkens from Belgium, in Madrid, Spain, Monday, May 5, 2014. (AP Photo/Andres Kudacki)

Spain Madrid Open Tennis

Na Li from China serves during a Madrid Open tennis tournament match against Kirsten Flipkens from Belgium, in Madrid, Spain, Monday, May 5, 2014. (AP Photo/Andres Kudacki)

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