World No. 4 Naomi Osaka advanced to the semifinals of the China Open on Friday and qualified for the season-ending WTA Finals featuring the top eight singles players and eight doubles teams.
The 21-year-old Osaka beat 19-year-old Bianca Andreescu from Canada 5-7, 6-3, 6-4 at the National Tennis Center in their first career meeting to end the U.S. Open champion's 17-match winning streak.
Osaka, the reigning Australian Open champion and 2018 U.S. Open champion, started slow and quickly fell to a 1-5 deficit. After losing the first set 5-7, she battled her way back to ride a five-game winning streak to take the second set.