NEW YORK (AP) — The Latest on the U.S. Open tennis tournament (all times local): 9:30 p.m. Bianca Andreescu became the first teenager to reach the U.S. Open semifinals in a decade, beating Elise Mertens 3-6, 6-2, 6-3. The No. 15 seed dropped a set for the first time in the tournament, but recovered...