I'm back to my top form Sam Stosur's ranking in recent months has dipped outside the top 10 after a stay of almost three years. Sam Stosur felt something in Carlsbad, southern California, earlier this month. Not just the welcome weight of another WTA singles trophy after almost two years, but the sense that she was back to playing almost like she had in her finest hardcourt tournament, the 2011 US Open. "I served very well, I was moving forward - it kind of felt like I was playing somewhat similar to how I was when I won here a couple of years ago, with just the style and the aggressiveness," Stosur said. Her first opportunity at Flushing Meadows will come against local qualifier Victoria Duval, on Tuesday. Stosur is ranked 13th, Duval 296th. By Saturday, the extent of the Queenslander's scouting report was that Duval is "a young American prospect, that's for sure," who had lost to Kim Clijsters in the first round here last year. "And that's all the research I've been able to do so far," smiled Stosur, who split with her coach, David Taylor, last week. Stosur's ranking in recent months dipped outside the top 10 after a stay of almost three years. She would love to return there but wanting it is not the same as winning more matches than she has been, even if her Carlsbad performance included some of the best tennis the 29-year-old has played in some time.