BEIJING – Third-seeded Bulgarian Grigor Dimitrov edged Argentine wildcard Juan Martin del Potro 7-6, 7-5 on Wednesday to reach the China Open quarterfinals.
Del Potro squandered an early lead in both sets against Dimitrov, runner-up in last year’s event to Scotland’s Andy Murray.
The 26-year-old Dimitrov will next take on fifth-seeded Spaniard Roberto Bautista Agut, who advanced to the final eight when British opponent Aljaz Bedene retired while trailing 6-0, 4-0.
Australian Nick Kyrgios, who is playing this event for the first time, had to rally from a set down to defeat German Mischa Zverev 3-6, 6-2, 6-2 and book his berth in the quarterfinals.
Kyrgios, the No. 8 seed, is next scheduled to face Belgian Steve Darcis, who got the better of Serbian Dusan Lajovic 6-3, 6-4.
In women’s singles, Russian wildcard Maria Sharapova lost for the first time in her career to Romanian Simona Halep.
The second seeded won the match 6-2, 6-2 to reach the quarterfinals and get a measure of revenge for seven previous defeats, including her loss to Sharapova in the first round of this year’s US Open.
Halep, who this week has a chance to overtake Spain’s Garbiñe Muguruza and become No. 1 in the world for the first time, will next face Russian Daria Kasatkina, a 4-6, 7-5, 6-2 winner over Poland’s Agnieszka Radwanska.
Ninth-seeded Latvian Jelena Ostapenko, meanwhile, defeated Australian Samantha Stosur 6-3, 7-5, to set up a round-of-16 matchup against local favorite Peng Shuai of China.