Betwinners Soccer news: Karolina Pliskova defeated Czech compatriot Petra Kvitova in straight sets to secure her place in the semi-finals of the WTA Finals in Singapore. More: https://t.co/E29GyqRpy3 https://t.co/ixTV2wBWm8

Karolina Pliskova defeated Czech compatriot Petra Kvitova in straight sets to secure her place in the semi-finals of the WTA Finals in Singapore. More: https://t.co/E29GyqRpy3 https://t.co/ixTV2wBWm8