Naomi Osaka reached the Western and Southern Open final with a straight-set victory over Elise Mertens.
Japan's fourth seed defeated Belgium's Mertens 6-2 7-6 (7-5) and will play Victoria Azarenka in the final.
Belarusian Azarenka fought back from a set down to beat Britain's Johanna Konta 4-6 6-4 6-1 in their semi-final.
Osaka's semi-final was due to take place on Thursday but tournament organisers suspended play for a day in protest against racial inequality.
It came after Osaka had pulled out of the match, saying that "as a black woman I feel as though there are much more important matters at hand".