Ben Shelton won his first ATP Masters 1000 title Thursday night at the National Bank Open in Toronto and served notice to the tennis world ahead of the U.S. Open.

Three years after his first ATP victory, the 22-year-old Ben Shelton is a Masters 1000 champion! The young American conquered the Canada Masters in Toronto following a 6-7, 6-4, 7-6 triumph over Karen Khachanov.

American fourth seed Ben Shelton battled from a set down to win his first ATP Masters 1000 title at the Canadian Open, defeating Russia's Karen Khachanov 6-7(5), 6-4, 7-6(3).