NEW YORK :Big-hitting Ben Shelton blasted his way past Frances Tiafoe 6-2 3-6 7-6(7) 6-2 and into the U.S. Open semi-finals on Tuesday in an all-American match up that lived up to its blockbuster billing.With the victory the 20-year-old Shelton becomes the youngest American to reach the U.S. Open men's last f
