Citi Open: Khachanov battles past Koepfer to reach last 16

Russian Karen Khachanov, the No 7 seed, moved into the last 16 of the Citi Open by edging out German qualifier Dominik Koepfer 6-7 (3), 7-5, 6-4 at Rock Creek Park Tennis Center in Washington on Tuesday night.

The Russian needed two hours and 45 minutes for the hard-fought win in which he was able to convert five of 17 break point chances. On the other hand, Koepfer was able to win three of the five break points he earned.

Khachanov, ranked No 24, will face the winner of the match between Australian Alex De Minaur, the No 11 seed, and Japanese Yoshihito Nishioka next.

Washington ATP 500, second-round matches (Rock Creek Park Tennis Center, hard, USD 2.108.110, most recent results first):

• Botic van de Zandschulp (8) beat Borna Gojo (Q): 7-6 (6), 6-7 (5), 6-4
• Andrey Rublev (1) beat Jack Draper: 6-4, 6-2
• Daniel Evans (16) beat Kyle Edmund: 6-1, 6-2
• Tommy Paul vs. Nick Kyrgios
• Christopher Eubanks vs. Frances Tiafoe
• Denis Kudla vs. Reilly Opelka
• Jack Sock vs. Maxime Cressy
• Grigor Dimitrov vs. Adrian Mannarino
• Taylor Fritz vs. Alexei Popyrin
• J.J. Wolf vs. Denis Shapovalov
• Sebastian Korda vs. Sebastian Baez
• Alex De Minaur vs. Yoshihito Nishioka
• Emil Ruusuvuori vs. Hubert Hurkacz
• Aslan Karatsev vs. Mikael Ymer
• Holger Rune vs. Benoit Paire