The Wimbledon champion won just seven points in the third set as she lost 6-1 2-6 6-0 to the world number 45.
Naomi Osaka of Japan serves while competing against Julia Goerges of Germany in their third round women's singles match in the China Open at the National Tennis Stadium in Beijing, on October 4, 2018.
World No 6 Osaka, meanwhile, maintained her strong form since her maiden Grand Slam title by crushing Julia Goerges 6-1 6-2.
Making a slow start to the first set, Osaka endured five deuces and saved one break point in the first game. "The last time I played on this court, I lost", said Osaka, who added she wanted to play well today in celebration of her coach Sascha Bajin's birthday.
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Perceval se reunió con varios representantes del gobierno venezolano, entre ellos el canciller, Jorge Arreaza , y el jefe de Estado, Nicolás Maduro .
"Not so many unforced errors [compared with a year ago]. I'm not sure how many I hit today, but sometimes previous year I think I was hitting a lot", she said. Osaka sprang a major upset when she defeated Williams in NY, in a final that was overshadowed by the American accusing the chair umpire of being "a thief" and "a liar".
In the quarterfinals, Osaka will play the victor of Thursday's later match between Angelique Kerber and Zhang Shuai.
China's Wang Qiang advanced with a 6-4 6-4 win over world number seven Karolina Pliskova in an hour and 37 minutes while Kiki Bertens of the Netherlands crashed out after a 6-4 6-3 defeat by Katerina Siniakova.
On the men's side, fourth-seeded Fabio Fognini downed Andrey Rublev 6-4, 6-3, Marton Fucsovics of Hungary beat Marco Cecchinato of Italy 6-4, 6-2, and Nikoloz Basilashvili of Georgia defeated Fernando Verdasco of Spain 7-6 (3), 6-4.