Top seeded duo of Sania Mirza and Martina Hingis has advanced to the quarterfinals of the Australian Open Tennis. The Indo-Swiss pair beat Russian – Italian pair of Svetlana Kuznetsova and Roberta Vinci by 6-1, 6-3 in straight sets. Two-time champion Victoria Azarenka today defeated Czech Republic's Barbora Strycova to surge into an Australian Open quarter-final of Women's Singles. The former world number one Belarusian was too strong for the Czech, winning 6-2, 6-4 in the 4th round in Melbourne. She will face seventh seed Angelique Kerber in the quarter-final. Earlier, Kerber defeated fellow German Annika Beck 6-4, 6-0 in the 4th round.Meanwhile, in Men's Singles, the 4th Round match between Swiss player Stan Wawrinka and Canadian Milos Raonic is underway.In another Men's Singles fixtures today, Spaniard David Ferrer will take on American John Isner while Scottish Andy Murray will face Bernard Tomic of Australia. World number one Serbian Novak Djokovic and world number three Swiss player Roger Federer have already entered the Men's Singles quarter-finals.