New York: Sania Mirza and Martina Hingis eased into the women's doubles quarterfinals at the US Open with a comfortable straight sets victory over Michaella Krajicek and Barbora Strycova here.

The top seeded Indo-Swiss combination produced a dominant performance to get the better of their 13th seeded opponents 6-3, 6-0 in 59 minutes.

Sania and Hingis were hardly stretched during the contest as they managed to hold their serve all through. They were off to a good start, breaking Krajicek and Strycova once in the first set.

They fired 14 winners in the opening set as against eight by their Dutch-Czech opponents.

Sania and Martina upped the ante in the second set, earning six break points, three of which they converted.

Krajicek and Strycova were clearly out of their depths, producing nine unforced errors as the Indo-Swiss duo wrapped up the second set in 26 minutes.

The top seeds will face Chan Yung-Jan and Chan Hao-Ching of Chinese Taipei in the last eight stage.

The Chinese Taipei pair, who are seeded ninth, prevailed in a tough contest with the unseeded Romanian duo of Irina-Camelia Begu and Raluca Olaru.

The ninth seeds conceeded the first set before fighting back to win 5-7, 6-1, 7-6 (4).