Wang Qiang of China returns the ball during the women's singles 1st round match against Paula Kania of Poland at the US Open tennis tournament in New York, the United States, on Aug. 26, 2014. Wang won 2-0. (Xinhua/Wang Lei)

Combination photo shows Wang Qiang (Back) of China and Paula Kania of Poland competing during their women's singles 1st round match at the US Open tennis tournament in New York, the United States, on Aug. 26, 2014. Wang won 2-0. (Xinhua/Wang Lei)

Wang Qiang of China reacts during the women's singles 1st round match against Paula Kania of Poland at the US Open tennis tournament in New York, the United States, on Aug. 26, 2014. Wang won 2-0. (Xinhua/Wang Lei)

Wang Qiang of China returns the ball during the women's singles 1st round match against Paula Kania of Poland at the US Open tennis tournament in New York, the United States, on Aug. 26, 2014. Wang won 2-0. (Xinhua/Wang Lei)

Combination photo shows Wang Qiang (L) of China and Paula Kania (R) of Poland competing during their women's singles 1st round match at the US Open tennis tournament in New York, the United States, on Aug. 26, 2014. Wang won 2-0. (Xinhua/Wang Lei)

Wang Qiang of China returns the ball during the women's singles 1st round match against Paula Kania of Poland at the US Open tennis tournament in New York, the United States, on Aug. 26, 2014. Wang won 2-0. (Xinhua/Wang Lei)

Wang Qiang of China returns the ball during the women's singles 1st round match against Paula Kania of Poland at the US Open tennis tournament in New York, the United States, on Aug. 26, 2014. Wang won 2-0. (Xinhua/Wang Lei)