Any triumph for an American here is greeted with patriotic howls of joy but, to understand the raw emotion behind the reaction of the 17-year-old's parents and her friends after the first-round victory, a delve into a quite remarkable background is required.
Duval, ranked 298 in the world, earned her place in the main draw through qualifying, was born in Miami to her Haitian parents and was brought up on the island until they could stand the place no longer.
After a seven year-old Victoria was held at gun-point during a vicious house robbery with her aunt and cousins all in attendance, something had to change.
Although no-one was harmed the family decided enough was enough and a year later moved to Boca Raton in Florida where the pursuit of Duval's career in tennis could begin in earnest.
But further trauma was around the corner. Father Jean-Maurice had stayed behind in Haiti to help run a medical clinic while Victoria trained for a career in tennis. In 2010 a massive earthquake devastated the island.
Jean-Maurice was buried alive for hours yet was able to pull himself out of the rubble although he was not unscathed. A punctured lung was the worst of it. Medical care was scarce - but a family friendship forged through Duval's tennis playing, came to the rescue. The friend, a wealthy real estate developer by name of Harry Kitchen, put on a private plane to bring Duval's father back to the US for treatment.
"We're forever grateful to them," the bespectacled Duval said. "If it weren't for them, my dad definitely wouldn't be here today. Not everyone just pays $30,000 to fly a helicopter to save someone."
This win completed the circle to some extent. Her dramatic 5-7, 6-4, 6-4 triumph which lasted 2 hours and 39 minutes was fantastic to watch. The effervescence of youth taking Duval over the line and into the second round.
"There's a lot to be thankful for," she said. "I don't take anything for granted. You never know what can happen any day. My dad's fortunate to be here . . . I thank God every day for everything that's happened. Life is short."
While Duval plays with an ever-present smile on her face, the same cannot be said of Heather Watson at the moment. The British No.2 had started well against the in-form Simona Halep, managing to take the first set before the Romanian, ranked 19 in the world and in rare form, hit back to inflict a 4-6, 6-4, 6-2 defeat to ensure the girl from Guernsey is still waiting for her first win at Flushing Meadows.
Watson, who is clearly still suffering the effects of a bout of the glandular fever which forced her off the tour between March and May, was brought to tears afterwards and said: "I've been doing a lot. I've been running about four times a week, I've been in the gym every day doing weights. I don't quite know what it is. It could be a few things - getting back to match fitness because when you're practising you play free and loose but in a match situation there's a lot more pressure.
"I thought I played a good two sets and in the third set my fitness let me down a bit. I was cramping in my legs. I think partly because in the first two sets I was a bit tight. All in all I'm pleased with how I played but I had my chances definitely and I had an opportunity to win that match in two sets. But she's got the confidence and she won the points when it mattered. I think that's why it hurts a lot is because I was so close. But if I keep making opportunities for myself I'll take some."
Dan Evans, who plays fellow tennis troublemaker Bernard Tomic today, has already made huge strides here no matter what happens against the highly rated and gifted Australian.
Management company Lagardere International have completed a deal to sign him in the aftermath of his brilliant first-round win over Kei Nishikori on Monday.
"I met with Dan on Sunday night after he qualified. We did it all that night" said agent Stuart Duguid. "It was good timing, because all the clothing manufacturers came along to his first-round match - he doesn't have a kit deal at the moment - and he played pretty well. We had been following his results over the summer. He made the finals of two challengers.
"There's been a shift in guys making breakthroughs at 22/23/24, rather than at 18 or 19 as it used to be. We saw his ranking climb over the summer and we thought he might be on the cusp. With Dan, it's all about the upside, and we really don't know what that is yet. He is certainly a guy with a huge amount of talent. If he gets it together he can be a top 50 player and better.
"He has clearly not maxed out yet."