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

Serena Williams (L) of the United States and Naomi Osaka of Japan pose for a photo during the awarding ceremony after the women's singles final match at the 2018 US Open tennis tournament in New York, the United States, Sept. 8, 2018. Osaka won 2-0 and claimed the title. (Xinhua/Wang Ying)