Kiki Bertens feels she can beat anybody after moving into the semi-finals on her debut in Singapore when Naomi Osaka retired.
Kiki Bertens moved into the WTA Finals last four as Naomi Osaka retired from their round-robin match in Singapore due to a left leg injury.
Dominic Thiem will take on fellow ATP Finals contender Kei Nishikori in the last eight of the Vienna Open after seeing off Sam Querrey.
Defending champion Roger Federer did not have things all his own way, but had too much for the unseeded Jan-Lennard Struff.
Caroline Wozniacki is learning to live with rheumatoid arthritis after being diagnosed prior to this year's US Open.
Elina Svitolina finished on top of the White Group at the WTA Finals after eliminating defending champion Caroline Wozniacki.
The unpredictable nature of the WTA Finals means anyone can lift the title, according to semi-finalist Karolina Pliskova.