Planet Sport Bet have Raducanu as more likely to win her home major tournament at Wimbledon next summer, but have also shortened her odds for the 2022 French and Australian Opens too.
Raducanu started the US Open tournament at a huge price of 400/1, and was still a 4/1 outsider before her semi-final victory over Maria Sakkari. But she began the final as 8/13 favourite and showed throughout the hard-fought match that she deserved those odds.
Playing in just her second grand slam tournament, the 18-year-old from Kent won all 20 sets she played in qualifying and the main draw to become the first British woman to win a grand slam singles title since Virginia Wade lifted the Wimbledon trophy in 1977.
Raducanu was sitting her A Levels little more than three months ago having not played a competitive match for more than a year but she has burst onto the big stage like no-one before her.
Fernandez is only two months older having celebrated her 19th birthday earlier this week but the Canadian, who had claimed a host of big scalps, including defending champion Naomi Osaka, had no answer to the brilliance of Raducanu, who claimed a 6-4 6-3 victory in an hour and 51 minutes.
Her achievement is unprecedented. No qualifier had ever reached a slam final before while she is the first woman ever to win a title in as few as two tournaments, and the youngest since Maria Sharapova triumphed at Wimbledon in 2004.
While Raducanu's Wimbledon breakthrough showed she could potentially be a grand slam winner in the future, no-one, least of all the teenager herself, expected it to come so soon.
Tim Henman backed Raducanu to add more grand slam titles to her maiden victory at the US Open.
"What she has achieved, second grand slam and the way she has gone about it, she will win more of these, she is that good," he told Amazon Prime.
"This is not some flash in the pan or fairy tale. She is playing top five tennis.
"Her world will be turned upside down but she has good people around her. It will be a hell of a ride if she can stay injury free."