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MOSCOW, RUSSIA OCTOBER 18, 2019: Karen Khachanov of Russia in the men's singles quarterfinal match against Andreas Seppi of Italy at the 2019 VTB Kremlin Cup tennis tournament, at the Krylatskoye Ice Palace. Mikhail Tereshchenko/TASS (Photo by Mikhail Tereshchenko\TASS via Getty Images)

MOSCOW, RUSSIA  OCTOBER 18, 2019: Karen Khachanov of Russia in the men's singles quarterfinal match against Andreas Seppi of Italy at the 2019 VTB Kremlin Cup tennis tournament, at the Krylatskoye Ice Palace. Mikhail Tereshchenko/TASS (Photo by Mikhail Tereshchenko\TASS via Getty Images)