Some may find it hard to bet against Svitolina with the way she played both matches Saturday and the fact Wozniacki has built a recent reputation of being a choker in final appearances.
Wozniacki eliminated Stephens in a tidy 83 minutes at Aviva Centre in Toronto.
On Sunday in Toronto, Svitolina remained flawless in finals on the year and further entrenched herself as an elite player in the current landscape with a 6-4, 6-0 win in the Rogers Cup final over Caroline Wozniacki.
Now it will be up to Alexander Zverev to try to dethrone Federer after he outlasted Shapovalov in the day's second semifinal thanks to a pair of key breaks.
Wozniacki outdid Pliskova in not only the service department but also in every other area of the game by winning 48% of her second serve points as compared to 45% won by Pliskova and was ahead even on the first serve return points won by 32% to 27% by Pliskova.
Stephens, ranked 934th in the world, gave a good showing in her third tournament after missing 11 months due to a foot injury. The Dane then held serve and followed with another break to dismiss Pliskova in 2 hours, 56 minutes and advance to the semifinals of the Toronto event for the first time.
Wozniacki, who leads the tour in wins this year, has not won a title in 2017, falling to 0-6 in finals. "Today was very hot, so I've been really struggling". The finalist will take home $243,920.
"I didn't win, but I think this whole week was a very big personal victory", Stephens said.
Stephens did not have high expectations for this summer and was quite pleased to reach the final four.
Pliskova played a more patient game of tennis than she is accustomed to playing, and tried dominating with her power in the rallies. "She's strong there and she played her game". I have just to move on and to look forward. I'm most happy that I'm actually really healthy going into the finals. She'll face either Elina Svitolina or Simona Halep for the title.
The 24-year-old fell to 1-6 against Wozniacki over her career. This is a quick turnaround that will really test the 22-year-old.