In Australian Open Tennis today, India's Sania Mirza and her American partner Bob Bryan have crashed out of the Mixed Doubles Quater finals. Czech pair of Lucie Hradecka and Frantisek Cermak defeated the third seeded Indo-American duo of Sania Mirza and Bob Bryan, 7-5,6-4 sealing a place in the semi finals.Yesterday, India's Rohan Bopanna and his partner from Chinese Taipei, Su-Wei Hsieh crashed out of the Mixed Doubles category.In the Men's Doubles category today, Bryan Brothers , Bob and Mike entered the finals of the Australian Open. The top seeded American pair defeated Italian pair of Simone Bolelli and Fabio Fognini, 6-4, 4-6, 6-1.In the Women's singles, Li Na of China stormed into the finals. Sixth seeded Li Na defeated World Number Two Russian Maria Sharapova, 6-2, 6-2.Meanwhile, in the Men's Singles, World Number Two Roger Federer of Switzerland and Briton Andy Murray yesterday booked the remaining two semi-final slots. They will play against each other for a finals berth.In the Men's single semi-final today World Number One Novak Djokovic will take on Spaniard David Ferrer.