China Open: Nadal, Garcia, Cirstea reach quarter-finals
Beijing: Spanish world number one Rafael Nadal has reached the China Open quarter-finals with victory over Russian Karen Khachanov.
Nadal, who won his third US Open title last month, triumphed 6-3 6-3 in Beijing.
The 31-year-old broke Khachanov, ranked 42 in the world, in the fourth game and looked in total control thereafter.
Next he will face big-serving American John Isner, who beat Argentina's Leonardo Mayer 6-0 6-3.
Nadal had survived two match points in his opening clash against Frenchman Lucas Pouille. Khachanov, 21, served seven double faults and was unable to convert any of his six break points.
Johanna Konta is still not certain of qualifying for the WTA Finals in Singapore after Caroline Garcia reached the China Open quarter-finals.
Britain's Konta holds the final qualification place for the eight-player season finale but can be overtaken by the Frenchwoman.
World number 15 Garcia beat compatriot Alize Cornet 6-2 6-1 and plays Elina Svitolina or Elena Vesnina next.
Garcia must reach at least the semis in China to keep her chances alive.
Konta lost in the first round in Beijing and has withdrawn from next week's Hong Kong Open with an injury.
Meanwhile, Sorana Cirstea on Thursday knocked out Karolina Pliskova 6-1, 7-5 to advance to the quarter-finals of the China Open tennis tournament.
Cirstea got revenge for her defeat in the only previous match against former world no. 1 Pliskova in 2014, reports Efe news agency.
Pliskova broke the 27-year-old Romanian's serve early in the first set, but Cirstea rallied back, winning six games in a row to clinch the first set.
The Czech fourth seed won another break of serve early in the second set and built on that advantage to lead 5-2, before Cirstea mounted an impressive comeback, winning five consecutive games to seal the win after 83 minutes.
Cirstea will next take on Latvia's Jelena Ostapenko, the reigning French Open champion, who qualified for the last eight after local favourite Shuai Peng retired while trailing 0-3.