Ben Shelton won the National Bank Open on Thursday night for the third and biggest title of his young career Thursday night, rallying to beat 11th -seeded Karen Khachanov of Russia 6-7 (5), 6-4, 7-6 (3).

Karen Khachanov rallied to defeat top seed Alexander Zverev and book an ATP Toronto Masters title clash with Ben Shelton, who beat second seeded Taylor Fritz on Wednesday.Shelton, seeded fourth, hammered Fritz 6-4,

Ben Shelton came back for a 6-7 (5), 6-4, 7-6 (3) victory over Karen Khachanov on Thursday night in the men's singles final at the National Bank Open. It was the American's first ATP Tour title of the season and third of his career.