Ben Shelton came from a set down to defeat Karen Khachanov 6-7(5), 6-4, 7-6(3) and win the Canadian Open in Toronto, securing his first ATP Masters 1000 title.
The 22-year-old American, seeded fourth, battled through a week that included victories over Flavio Cobolli, Alex de Minaur, and Taylor Fritz.
Shelton became the youngest American man to win a Masters 1000 since Andy Roddick in 2004.
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Khachanov took the first set after a tiebreak, but Shelton responded by breaking serve and saving break points to force a decider, which he won in another tiebreak.
