Casper Ruud was no match for Karen Khachanov in the Canadian Open round of 16 as he suffered a straight-sets defeat.

Alex Michelsen of the United States has reached the quarterfinals of the National Bank Open with a straight sets victory over ...

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 ...

Karen Khachanov triumphs over Casper Ruud ...

Karen Khachanov reached his second straight prestige quarter-final on Saturday, ambushing eighth seed Casper Ruud  6-4, 7-5 ...

At 20, Michelsen is the youngest American man to reach the quarterfinals in Canada since Andy Roddick in 2003.

Five fast facts about Toronto Open quarterfinalist Karen Khachanov following his big win over Casper Ruud on Saturday.

Alex Michelsen defeats longtime friend and fellow American Learner Tien to advance to his first Masters 1000 in Toronto.