Semi-final line-up looking strong.
Stars could decide tie face-to-face.
Karolina Pliskova says she lacked a "little bit of power".
US Open champion books final berth.
Serena Williams gracious in defeat.
Serena suffers dramatic failure on brink of victory.
Czech looking menacing in Melbourne.
Contrasting wins for Elina Svitolina and Karolina Pliskova.
Czech grabs victory from brink of defeat.
Karolina Pliskova bounced back from a second-set meltdown.