Factbox on the U.S. Open women's final between British 18-year-old Emma Raducanu and Canadian 19-year-old Leylah Fernandez:
U.S. OPEN WOMEN'S FINAL MILESTONES
* First Grand Slam final in the Open Era in the men's and women's game to feature two unseeded players.
* First Grand Slam final to be contested by two teenagers since the 1999 U.S. Open when American Serena Williams beat Switzerland's Martina Hingis 6-3 7-6(4).
EMMA RADUCANU
* First qualifier in the men's and women's game to reach a Grand Slam final.
* First British woman to reach the U.S. Open final since Virginia Wade won the title in 1968.
* First British woman to reach a Grand Slam final since Virginia Wade won Wimbledon in 1977.
* Youngest British Grand Slam finalist since Christine Truman won Roland Garros in 1959.
* First woman to reach the U.S. Open final without dropping a set since German Angelique Kerber in 2016.
* Entered the tournament ranked world number 150 and will move up to 32nd by reaching the final. Raducanu will be world number 24 if she wins the title.
* Regardless of the result, Raducanu will end Johanna Konta's 310-week reign as the top-ranked British woman on Monday. Konta is ranked 47 in the world.
LEYLAH FERNANDEZ
* Second Canadian in three years to reach the U.S. Open final after Bianca Andreescu was crowned champion in 2019.
* Fourth Canadian in the men's and women's game to reach a Grand Slam final after Eugenie Bouchard (2014 Wimbledon), Milos Raonic (2016 Wimbledon) and Andreescu.
* Youngest player to beat three top five seeds (3-Naomi Osaka, 5-Elina Svitolina and 2-Aryna Sabalenka) at a Grand Slam since American Serena Williams accomplished the feat when she won the U.S. Open in 1999.
* Entered the tournament ranked world number 73 and will move up to 27th by reaching the final. Fernandez can become world number 19 if she wins the title.