Angelique Kerber of Germany returns a ball to Caroline Wozniacki of Denmark during the women's singles semi-final match at the 2016 U.S. Open in New York, the United States, Sept. 8, 2016. Kerber won 2-0. (Xinhua/Yin Bogu)
Angelique Kerber of Germany returns a ball to Caroline Wozniacki of Denmark during the women's singles semi-final match at the 2016 U.S. Open in New York, the United States, Sept. 8, 2016. Kerber won 2-0. (Xinhua/Yin Bogu)
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