Yardbarker

Karen Khachanov uses serve to slay Casper Ruud in Toronto

No. 11 seed Karen Khachanov won 29 of 30 first-serve points (96.7 percent) en route to a 6-4, 7-5 victory over No. 8 Casper Ruud on Saturday to reach the quarterfinals of the National Bank Open at Toronto.

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