Laura Robson has credited her improved fitness levels for a positive run at the ongoing US Open.
The 18-year-old Brit has defeated Kim Clijsters and Li Na at Flushing Meadows to set up a meeting with defending champion Samantha Stosur later today.
Having managed to avoid injury for a number of months now, Robson has admitted that it has had a positive impact on her game.
"It's been massive," she said. "It makes so much of a difference mentally. I just feel like I'm healthy.
"This is my third match and I'm feeling fine, I'm feeling fit. I'm really ready for the next match, but in the past, after the first round here, I had needed a lot of physio work."
Robson had never previously gone beyond round two of a Grand Slam prior to this year's tournament in New York.
