In the season's first Grand Slam, Australian Open, the competition is progressing towards the semifinal stages.From the tennis arena in Melbourne today, top seeds in Men's and Women's event will battle out for a semi final berth.In men's singles, world number one Serbian Novak Djokovic will take on eighth seed Canadian Milos Ranoic and defending champion Stanislas Wawrinka will be taking on Japan's Kei Nishikori for the final four position. Yesterday, Czech's Tomas Berdych and Briton Andy Murray had secured the other semifinal spot. In the women's singles event yesterday, Russians, Maria Sharapova and Ekaterina Makarova progressed to the semi-finals. Today, top seed Serena Williams will be taking on Dominika Ciblukova from Slovakia for the semifinal position. In a quarterfinals match played today, Venus Williams of US was defeated by her compatriot Madison Keys 3-6, 6-4, 4-6.In the Mixed Doubles India's Sania Mirza and Leander Paes, with their teammates, will also look to book semi-final berths today.