Francesca Schiavone continued her fine form as she powered past Anastasia Pavlyuchenkova with the loss of just three games to reach the quarter finals.
The Italian had struggled with her form immediately after winning the French Open title, her maiden Grand Slam crown, and made little impact at Wimbledon. But she has been in fine form in New York and is yet to drop a set on her way to the quarter finals.
An early break in the first saw her take the opening set for her nineteen year old opponent before handing out a bagel set in the second.
But Pavlyuchenkova was struggling in that second set and the trainer was called for treatment for some right shoulder and arm problems. The twentieth seed never recovered and Schiavone powered past.
She will now face two time winner Venus Williams for a spot in the semi final.
Williams is the third seed at Flushing Meadows and is slowly getting back to her best having been sidelined from injury since an earlier than expected exit from Wimbledon earlier this summer.
Despite coming through in straight sets Williams struggled with her serve, making just 48% of first serves as well as being broken three times, as she eventually saw off Shahar Peer.
Both players broke serve and were broken throughout a mammoth opening set as neither player could capitalise on the chances that came their way. In the twelfth game it was Peer who was serving to stay in the set.
Both women missed five chances a piece to take the game, Williams winning the game would have seen her take the set, but Peer managed to hold on to force the set to a tie break.
Here it was Williams who dominated as she opened up a 5-1 lead before going on to take it 7-3 and with it the opening set.
Williams was more dominant in the second and a double break saw the American open up a 5-2 lead. While Peer did manage to get one of the breaks back it was too little too late and Williams secured a 7-6 (7-3) 6-3 win.
Speaking to the BBC after the match she admits that she is still finding her fitness: "It was a little tricky - it was important for me to stay positive. I'm OK. It helps me not playing the doubles. I'm happy to be here and playing well."
FemaleFirst Helen Earnshaw