Daria Kasatkina of Russia celebrates after winning the women's singles 2nd round match against Angelique Kerber of Germany at WTA Qatar Open 2017 at the International Khalifa Tennis Complex of Doha, Qatar, Feb. 16, 2017.(Xinhua/Nikku)
Daria Kasatkina of Russia celebrates after winning the women's singles 2nd round match against Angelique Kerber of Germany at WTA Qatar Open 2017 at the International Khalifa Tennis Complex of Doha, Qatar, Feb. 16, 2017.(Xinhua/Nikku)