The American will play Romania 's Simona Halep in the last four .
Romania 's Simona Halep beat Carla Suarez Navarro 5 - 7 6 - 1 6 - 1 .
The American will play Romania 's Simona Halep , who beat Carla Suarez Navarro 5 - 7 6 - 1 6 - 1 , in the last four .