Radwanska has won all 6 of their previous matches. Their last match was in April this year on clay. She won in straight sets. Pliskova has never won a set against her. They have never played indoors.
Both have played well this week and each won their match against Muguruza. Radwanska beat Muguruza in straight sets whereas pliskova had to save match points and came back from 2-5 in the third set.. A win today takes them through to the semis.
I have to favour Radwanska as defending champion but think we see a very tight match and 3 sets. Lay the set 1 winner or lay Radwanska if she breaks first.