Russia's Karen Khachanov reached the quarterfinals of the ATP-250 tournament in the Netherlands.
The 23rd-ranked player had to defeat Kamil Majchrzak in four sets - 5:7, 7:5, 7:6 (7:5).
The two players spent on the court 2 hours and 40 minutes.
Khachanov's next opponent will be Felix Auger-Aliassime of Canada.
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