Japan Open: Karatsev into quarter-finals, defeats Zhang
Aslan Karatsev won against Zhizhen Zhang 6-3, 6-4 on Thursday afternoon and will play Australian Alex De Minaur, the No 4 seed, in the next round

Russian Aslan Karatsev beat Chinese Zhizhen Zhang 6-3, 6-4 to move into the last eight of the Japan Open at the Ariake Colosseum in Tokyo on Thursday afternoon.
Karatsev, ranked No 50, will play Australian Alex de Minaur, the No 4 seed, next.
The Russian won against American Frances Tiafoe, the No 6 seed (6-3, 7-6 (4)) ahead of his victory.
In the previous round of the Tokyo Open, Zhang, ranked No 57, edged out Pole Hubert Hurkacz (3-6, 6-4, 7-6 (4)).
Tokyo ATP500, other second-round results (Ariake Colosseum, hard, USD 2.013.940, most recent results first):
- Shintaro Mochizuki (WC) beat Taylor Fritz (1): 0-6, 6-4, 7-6 (2)
- Alex De Minaur beat Diego Schwartzman: 6-0, 7-5
- Alexei Popyrin beat Cristian Garin (Q): 4-6, 7-6 (3), 6-2
- Ben Shelton beat Jordan Thompson: 6-7 (5), 6-4, 6-3
- Marcos Giron (Q) beat Casper Ruud (2): 6-3, 6-4
- Tommy Paul (5) beat Mackenzie McDonald: 6-4, 6-2
- Felix Auger-Aliassime (8) beat Sebastian Ofner: 6-4, 6-1