Gabriela Dabrowski of Canada and Xu Yifan (R) of China serve during the women's doubles second round match against Kaitlyn Christian of the United States and Carina Witthoeft of Germany at the French Open Tennis Tournament 2018 in Paris, France on June 2, 2018. Gabriela Dabrowski and Xu Yifan won 2-0. (Xinhua/Chen Yichen)