Raducanu’s fairytale in New York continued as she powered past Greek 17th seed Maria Sakki 6-1 6-4 in their semi-final on Thursday.
The 18-year-old Brit came through qualifying and has yet to drop a set in this year’s tournament, breezing through the competition with a maturity that belies her tender years and inexperience.
Raducanu becomes the first qualifier ever to reach a Grand Slam final – male or female – and is the first British women to compete in a major singles final since Virginia Wade at Wimbledon 44 years ago.
Raducanu, who was born in Canada to a Chinese mother and Romanian father, but moved to London at the age of two, said she was in disbelief at her achievement.
“Honestly the time here has gone so fast, I’ve been taking care of each day and three weeks later I’m in the final, I can’t believe it,” said the youngster, who is ranked 150 in the world.
“You can’t get ahead of yourself and just stay present. Today I wasn’t thinking about anyone else except for myself…
“Is there any expectation?” Raducanu asked jokingly. “I’m a qualifier so there’s no pressure on me!”
Raducanu becomes the youngest women’s Grand Slam finalist since Russia’s Maria Sharapova claimed the Wimbledon title at the age of 17 back in 2004.
Fernandez, who only turned 19 this week, made her own slice of history by beating Belarusian second seed Aryna Sabalenka in their semi-final earlier on Thursday, having already seen off defending champion Naomi Osaka and fifth seed Elina Svitolina.
The clash between Raducanu and Fernandez will be the first all-teenage Grand Slam final affair since 1999, when Serena Williams beat Martina Hingis, and will be only the eighth such meeting in the Open Era.
It wall also be the first time two unseeded players have met in a Grand Slam final (male or female) since the Open Era began back in 1968.
“My mental toughness has come from years and years of hard work and blood. On-court and off-court sacrifices,” said world number 73 Fernandez after her win.