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.

Karen Khachanov owns four ATP Tour titles.

Karen Khachanov celebrates beating Mikael Ymer on Thursday night in a fifth-set tie-break at the Australian Open.

Karen Khachanov looks to push Russia to the inaugural ATP Cup title in Sydney.

Karen Khachanov owns a 3-0 record in ATP Cup singles matches.

Team Russia: Daniil Medvedev, Karen Khachanov, captain Marat Safin, Teymuraz Gabashvili, Ivan Nedelko and Konstantin Kravchuk receive their medals for finishing at Group D winners in Perth at the ATP Cup.

Team Russia's Karen Khachanov won his third singles match of the ATP Cup against Viktor Durasovic on Tuesday in Perth.

Karen Khachanov celebrates recording the opening singles win on Sunday for Team Russia at the ATP Cup in Perth.

Karen Khachanov raised his game and secured the 49-minute second set against Taylor Fritz on Sunday at the ATP Cup in Perth.

Team Russia captain Marat Safin and Karen Khachanov look at real-time statistics and match vision in Perth during the ATP Cup on Friday.

Karen Khachanov celebrates an opening win for Team Russia against Team Italy on Friday in Perth at the ATP Cup.

ATP Cup Team Russia's Daniil Medvedev, captain Marat Safin and Karen Khachanov hit Cottesloe Beach in western Perth on Tuesday morning.

Karen Khachanov and Daniil Medvedev will kick off the 2020 season at the ATP Cup in Perth.

Karen Khachanov saves five match points to defeat Philipp Kohlschreiber at the VTB Kremlin Cup on Wednesday.

Karen Khachanov is the VTB Kremlin Cup defending champion.

Fourth seed Karen Khachanov grows in confidence during his quarter-final victory over Fabio Fognini on Friday in Beijing.

Karen Khachanov hits 13 aces on Wednesday and advances to the third round in Cincinnati.

Karen Khachanov is looking to win his second ATP Masters 1000 title this week in Cincinnati.

Karen Khachanov evens his FedEx ATP Head2Head series against Alexander Zverev with a straight-sets win in Montreal.

Karen Khachanov is going for his second ATP Masters 1000 title this week in Montreal.

Tenth seed Karen Khachanov books his place in the Wimbledon third round on Wednesday for the third consecutive year.

Karen Khachanov was ranked outside the Top 35 of the ATP Rankings just 12 months ago.