The 23-year-old Russian Karen Khachanov (ATP-11) on Monday for the quarterfinals of Roland-Garros posted. That was at the expense of the Argentinian Juan Martin del Potro (ATP 9), last year semi-finalist. After 3 hours and 9 minutes was 7-5, 6-3, 3-6 and 6-3.
In his first quarterfinals at a Grand Slam is Khachanov Wednesday against the Austrian fourth seed Dominic Thiem (ATP-4). That eliminated the Frenchman Gael Monfils (ATP-17) 6-4, 6-4 and 6-2.
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