Karolina Pliskova believes Dani Vallverdu could be the man to take her to another level as she eyes a first grand slam title.
Former Wimbledon champion Conchita Martinez will no longer be Karolina Pliskova's coach, the world number two has announced.
Elina Svitolina is on course for a second successive WTA Finals triumph but must beat world number one Ashleigh Barty to achieve the feat.
Simona Halep bowed out of the WTA Finals with harsh words from coach Darren Cahill ringing in her ears as Karolina Pliskova advanced.
After 17 wins in succession, Bianca Andreescu has lost three on the bounce and is out of the WTA Finals, limited by a left knee injury.
Bianca Andreescu was unable to win from a set up against Simona Halep at the WTA Finals after Elina Svitolina beat Karolina Pliskova.
Debutant Ashleigh Barty sees no favourites at the WTA Finals, but Karolina Pliskova suggests the number one might be at a disadvantage.
Naomi Osaka, Petra Kvitova and Belinda Bencic will be top seed Ashleigh Barty's opponents in the Red Group in Shenzhen.
Bianca Andreescu and Ashleigh Barty both won at the China Open, though neither progressed in routine fashion on Wednesday.