Updated: Williams upset in US Open semifinals by Pliskova

NEW YORK — The Latest on the U.S. Open (all times local): 8:48 p.m. Serena Williams was upset in the U.S. Open semifinals for the second year in a row, beaten 6-2, 7-6 (5) by 10th-seeded Karolina Pliskova of the Czech Republic on Thursday night. Williams, who clutched at her left hamstring occasionally in the […]