Laura Robson admitted to feeling "rusty" ahead of her first round triumph at the US Open on Monday.
The 19-year-old, seeded 30th for the Grand Slam beat Spain's Lourdes Dominguez Lino 7-5 6-0 and will play Caroline Garcia in round two after the Frenchwoman beat American Shelby Rogers 6-3 6-2.
Since Wimbledon, Robson has played just two matches because of a wrist injury but she was pleased with her showing at Flushing Meadows.
She said: "I always knew going into the match that I'd be a little bit rusty because I haven't played in a few weeks.
"Practice points are very different to playing in the first round of a Slam. I just had to stay focused out there and confident in my game plan.
"I was pleased how I played, especially in the second set, I really felt like I got a rhythm in the rallies, played very patiently, but then took my chance when the opportunity arose."
She added: "The wrist is OK. It's going to be taped for the next match, but nothing's changed."
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