Robson won the 2008 Wimbledon junior girls' title
Former Wimbledon junior champion Laura Robson caused a surprise in US Open qualifying by beating Stephanie Foretz, ranked 332 places above her.
The 15-year-old world number 460, who received a wildcard into qualifying, recorded a 7-5 6-1 win over the world number 128 from France.
Fellow Britons Elena Baltacha and Mel South also made comfortable progress through to the second round.
But Alex Bogdanovic, James Ward and Dan Evans all suffered first-round defeats.
"I was so nervous at first because you're playing at the US Open and the Arthur Ashe stadium is right there," said Robson.
"I looked up and saw and was, like, 'Oh my God!' because I've watched a lot of US Open matches on TV, especially when Andy (Murray) made the final here last year.
"Actually on court it was quite relaxed though, so I tried to bring that to my tennis and play in a relaxed way. In the beginning I was a bit overwhelmed but I soon got into the match. I started to feel more comfortable and I realised that I could do it. "
Baltacha, the second seed in qualifying, thrashed Argentina's Betina Jozami, while world number 147, South, beat Renata Voracova 6-3 7-5.
Bogdanovic, the British number three, was a set and a break up before losing 3-6 7-6 (7-5) 6-3 to Austria's Alexander Peya.
Evans played out a close match with Brazil's Julio Silva but lost out in two tie-breaks, 7-6 (7-0) 7-6 (7-0), while Ward went down to a more comprehensive 6-2 6-3 loss to Israel's Harel Levy.
Katie O'Brien won her first-round match on Tuesday.
She now faces Georgia's Anna Tatishvili while Robson will play Hungarian Aniko Kapros and Baltacha has been drawn against Andrea Hlavackova of the Czech Republic.