Melbourne: Top seeds Martina Hingis and Sania Mirza continued their domination in the women’s doubles as the Indo-Swiss pair won their 32nd straight win by beating twin sisters Nadiia and Lyudmyla Kichenok, 6-2, 6-3 in the Australian Open, here on Saturday.

The World Co-No.1s haven't lost a match since August, and were always in control during the 63 minute win over the Kichenoks. Hingis and Mirza hit a combined 18 winners to just 11 unforced errors, and won 72% of their first serve points.

Up next for the top-ranked team is the unseeded pair of Svetlana Kuznetsova and former doubles No.1 Roberta Vinci, who beat Jessica Moore and Storm Sanders, 6-0, 6-3.

Meanwhile, Sania Mirza who is the top seed in mixed doubles; she and partner Ivan Dodig; got the better of Aussies Ajla Tomljanovic and Nick Kyrgios, 7-5, 6-1.

Meanwhile, in singles, top seed Serena Williams did not find much difficulty against Margarita Gasparyan as the defending champion beat the rising Russian 6-2, 6-1 in her fourth round Australian Open encounter, here on Saturday. Serena will now meet No.5 seed Maria Sharapova.

Meanwhile, the 2008 Australian Open champion despite trailing No.12 seed Belinda Bencic twice by a break in the opening set, held her ground to beat the Swiss youngster 7-5, 7-5.

In another match Ana Ivanovic lost to Madison Keys 6-4, 4-6, 4-6.