Naomi Osaka stuns S. Williams to win her first Grand Slam title at U.S. Open

Serena Williams of the United States lifts up the trophy for the runner-up during the awarding ceremony for the women's singles event at the 2018 US Open tennis tournament in New York, the United States, Sept. 8, 2018. Serena Williams lost 0-2 in final match against Naomi Osaka of Japan on Saturday. (Xinhua/Li Muzi)