The Czech Republic beat the United States to reach the Davis Cup Final 8 after U.S. Open finalist Ben Shelton and Learner Tien both lost their singles matches on Saturday. Jakub Mensik beat Shelton 5-7, 6-4, 6-3 to level the best-of-five series at 2-2 before Jiri Lehecka sent a roaring Prague crowd into raptures by