Pavlyuchenkova gained her first final of the year with a 4-6, 7-5, 6-4 win over American Vania King.
The 21-year-old Russian will be vying her fourth career WTA singles title.
Slovakia's Rybarikova pulled off a 6-3, 6-3 upset of third-seeded American Sloane Stephens to advance.
Rybarikova, 23, will be looking for her third career WTA singles crown.
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