Karen Khachanov breaks James Duckworth's serve four times on Wednesday to reach the Moscow quarter-finals.

Andrey Rublev and Karen Khachanov save all three break points they face to reach the second round in Moscow.

Argentina's Maximo Gonzalez attempts to block Karen Khachanov's overhead smash as the Russian and Andrey Rublev prevail over Gonzalez and Simone Bolelli in the first round in Cincinnati.

Karen Khachanov breaks Cameron Norrie's serve three times to reach the second round in Toronto.

Karen Khachanov defeats Pablo Carreno Busta on Friday in Tokyo to reach the gold medal match.

Karen Khachanov and Andrey Rublev photographed by Radka Leitmeritz at the NOVENTI OPEN in Halle.

Karen Khachanov photographed by Radka Leitmeritz at the NOVENTI OPEN in Halle.

Karen Khachanov defeats Sebastian Korda to reach his first Wimbledon quarter-final on Monday.

Andrey Rublev and Karen Khachanov win a Match Tie-break against Jeremy Chardy and Fabrice Martin to reach the second round in Monte-Carlo.

Karen Khachanov and Andrey Rublev have reached two ATP Masters 1000 finals as a team.

Karen Khachanov plays at a high level against Stefanos Tsitsipas on Friday in the Rotterdam quarter-finals.

Karen Khachanov is now 2-2 in his ATP Head2Head series against Stan Wawrinka, after beating the 2015 champion in Rotterdam on Tuesday.

Karen Khachanov and Andrey Rublev beat Dusan Lajovic and Stan Wawrinka on Monday in Rotterdam.

Karen Khachanov beats wild card Aleksandar Vukic on Tuesday in the Australian Open first round.

Karen Khachanov levels his ATP Head2Head series with Kevin Anderson at 1-1 by beating the former World No. 5 at the Great Ocean Road Open.

Karen Khachanov will face Kevin Anderson for a place in the Great Ocean Road Open quarter-finals on Friday.

Karen Khachanov owns a 20-12 record this season.

Andrey Rublev and Karen Khachanov hit 11 aces in their upset win against top seeds Jamie Murray and Neal Skupski in St. Petersburg.

Karen Khachanov is attempting to win his second ATP Tour title on Russian soil.

Karen Khachanov has reached the Round of 16 in each of his four visits to Roland Garros.

Karen Khachanov, the No. 15 seed, battles past Jiri Vesely on Thursday in the Roland Garros second round.

Karen Khachanov is making his fifth straight appearance in the US Open main draw.

Pablo Carreno Busta and Karen Khachanov walk towards Court 12 for their second-round match at the Western & Southern Open.

Karen Khachanov, the No. 11 seed, gets the better of Alexander Bublik at the Western & Southern Open on Sunday.

Karen Khachanov smiles at his team on Sunday after beating Alexander Bublik at the Western & Southern Open.