Osaka defeated her fellow 20-year-old Daria Kasatkina at the BNP Paribas Open, and del Potro handed Roger Federer his first loss of the year.
CHRISTOPHER CLAREY, New York Times: Tennis
Sun, 03/18/2018 - 6:03pm
Osaka defeated her fellow 20-year-old Daria Kasatkina at the BNP Paribas Open, and del Potro handed Roger Federer his first loss of the year.