The 21-year-old only turned professional just over a year ago but has made rapid strides, reaching the US Open semi-finals last month, and he will become the fourth American in the top 15 of the rankings on Monday.
Shelton showed no nerves during the final against Karatsev, and it was the Russian who smashed his racket in frustration during the second set as his opponent eased to a 7-5 6-1 victory.
Shelton, who could yet make a charge to qualify for the ATP Finals next month, is coached by his father, Bryan, and the pair become the fourth father-son duo to win tour-level singles titles in the open era. –Independent
