Pliskova will face either new world number one Angelique Kerber or Caroline Wozniacki in Saturday 's final .
Pliskova is the first Czech woman in the US Open final since Helena Sukova in 1994 .
Pliskova , the first Czech woman in the US Open final since Helena Sukova in 1994 , will face either new world number one Angelique Kerber or Caroline Wozniacki in Saturday 's final .