Coco Gauff will meet incoming world number one Aryna Sabalenka in the US Open final on Saturday as she bids for a first Grand Slam title.
The 19-year-old, appearing in her second major singles final, is the youngest American finalist in New York since Serena Williams in 1999.
Belarusian Sabalenka, who will become the new number one on Monday, is aiming for a second major title of the year after her Australian Open triumph.
The winner will earn $3m (£2.4m).
Gauff leads the head-to-head, having won three of their five meetings on the WTA Tour.