Highlights of women's singles round of 16 match of 2019 WTA Shenzhen Open

Wang Xiyu of China serves during the women's singles round of 16 match against Elise Mertens of Belgium at WTA Shenzhen Open tennis tournament in Shenzhen, south China's Guangdong Province, Jan. 7, 2020. (Xinhua/Mao Siqian)