Canadian teenager Andreescu defeats S.Williams to win US Open title

Bianca Andreescu (R) of Canada and Serena Williams of the United States pose during the awarding ceremony after the women's singles final match between Bianca Andreescu of Canada and Serena Williams of the United States at the 2019 US Open in New York, the United States, Sept. 7, 2019. (Xinhua/Liu Jie)