Del Potro Outslugs Isner For Spot in Final Four
Juan Martin del Potro burst his way into the U.S. Open semifinals on Tuesday, hitting 49 winners and withstanding 67 from 11th seeded American John Isner in a 6-7(5), 6-3, 7-6(4), 6-2 victory inside Arthur Ashe Stadium. “I’m so happy to reach another semifinals in my favorite tournament,” del Potro told the New York…

