Duan Yingying/Zheng Saisai win women's doubles 3rd round at French Open - Xinhua | English.news.cn
Chinese professional tennis players Duan Yingying and Yang Zhaoxuan compete against Ukrainian professional tennis player Lyudmyla Kichenok and Sloven Stock Photo - Alamy
Eugenie Bouchard in action against Ying-Ying Duan during day two of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon Stock Photo - Alamy
Tennis Abstract: Ying Ying Duan Match Results, Splits, and Analysis
High School Senior Profile: Adam Duan - USTA Florida
Lauren Duan DHS girls tennis vs. Oak Ridge photo
The Reporter/Times Herald/Montgomery Media Boys Tennis All-Area Team - PA Prep Live
Naomi Osaka vs Duan Yingying - 2016 US Open 2R Highlights - YouTube