Petra Kvitova's Connecticut Open title defence came to an end with a crushing defeat at the hands of Agnieszka Radwanska in the semi-finals.
Radwanska crushed the Czech two-time defending champion and finalist the past four years 6-1 6-1 in one hour and 17 minutes on Friday.
The Polish top seed was in fine form, while Kvitova never got going - losing to Radwanska for the third straight time.
Kvitova tried her best to overpower Radwanska, but 40 unforced errors - 23 of which came in the second set - were costly.
Radwanska was far more consistent, reaching her 26th WTA Tour final and second of the year.
Eyeing her 19th title, Radwanska will face Elina Svitolina after the Ukrainian ended the run of lucky loser Johanna Larsson.
The 10th-seeded Svitolina eased to a 6-4 6-2 victory over the Swede to book a place in her first WTA Premier decider.
Radwanska and Svitolina have met twice before, with the former winning both of those meetings.