
Russian tennis player Maria Sharapova returns the ball against Mariana Duque-Marino of Colombia during day four of the Madrid Open tournament in Madrid, Spain, on May 5, 2015. Sharapova won 2-0. (Xinhua/Xie Haining)

Russian tennis player Maria Sharapova returns the ball against Mariana Duque-Marino of Colombia during day four of the Madrid Open tournament in Madrid, Spain, on May 5, 2015. Sharapova won 2-0. (Xinhua/Xie Haining)