BEIJING (AP) — Jessica Pegula became the third American to reach the semifinals of the China Open after rallying to beat compatriot Emma Navarro on Friday. The fifth-seeded Pegula wasted six set points in the opener but dominated the next two sets to triumph 6-7 (2), 6-2, 6-1 “I told myself not to get too frustrated,” Pegula said. “Just stay calm, try to relax a little bit, and not try as hard to execute the game plan.