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

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