Maria Sharapova put in a more convincing display in her second round match as she saw off Anastasiya Yakimova 6-1 6-1.
The Russian struggled in her opening clash with Heather Watson and was forced to dig deep as she was pushed to three sets.
But there was to be no such trouble for the former world number one on Arthur Ashe last night as she lost just two games on her way to the third round.
The serve was a weapon rather than a hindrance for the Russian last night and she looked to be getting back into the form that brought her the Cincinnati title just a couple of weeks ago.
Speaking to the WTA after the match Sharapova said: "I played a pretty tricky opponent tonight who didn't play the typical kind of tennis.
"Sliced a lot, a lot of high balls. Maybe the first couple of games I was a little bit impatient.
"Then I got really steady. I was aggressive. I still felt I could have moved in a little bit more, but overall I played solid."
She will now place Flavia Pennetta in the third round as the Italian saw off Romina Oprandi 6-0 6-3.
Vera Zvonerava also booked her spot in the third round after battling back from dropping the second set against Kateryna Bondarenko.
The second seed had edged the opening set 7-5 before Bondarenko hit back in the second to take it 3-6.
But Zvonareva recovered in the third and deciding set to see off Bondarenko 7-5 3-6 6-3. And she will now face Anabel Medina Garrigues.
Medina Garrigues beat Britain's Laura Robson 6-2 6-3 to set up the clash with the second seed.
FemaleFirst Helen Earnshaw