World number eight Kiki Bertens is now in double figures for WTA titles after she once again proved to be a cut above in St Petersburg.
Defending St Petersburg Ladies' Trophy champion Kiki Bertens overcame Ekaterina Alexandrova to set up a final against Elena Rybakina.
World number eight Kiki Bertens will be the first player to take on Kim Clijsters on the WTA Tour in over seven years next week.
Illness forced Petra Kvitova to withdraw at the St Petersburg Ladies Trophy, while defending champion Kiki Bertens reached the semi-finals.
Petra Kvitova had to slog her way into the quarter-finals in St Petersburg but Kiki Bertens was in scintillating form.
Simona Halep and Garbine Muguruza marched into the last eight on Monday, as Angelique Kerber fell to Anastasia Pavlyuchenkova.
Ashleigh Barty bounced back in Shenzhen on Thursday, while Kiki Bertens, in for the injured Naomi Osaka, bowed out with illness.
The couch was proving a comfortable resting spot for Kiki Bertens before she was called upon to replace Naomi Osaka in Shenzhen.
Naomi Osaka's withdrawal saw Kiki Bertens get a late call to compete in the WTA Finals and the Dutchwoman made a winning start.
Australian Open champion Naomi Osaka has pulled out of the WTA Finals and will be replaced by Kiki Bertens.