Six-time champion Serena Williams faces 10th seed Karolina Pliskova in the last four.
Second seed Angelique Kerber takes on two-time finalist Caroline Wozniacki in the other semi.
Six-time champion Serena Williams faces 10th seed Karolina Pliskova in the last four.
Second seed Angelique Kerber takes on two-time finalist Caroline Wozniacki in the other semi.