World Number One Victoria Azarenka of Belarus will today lock horns with Na Li of China in the Women's Singles title clash of the Australian Open Tennis tournament at Melbourne. In the semi-finals, defending champion Azarenka had defeated Sloane Stephens of the United States, 6-1, 6-4; while sixth seed Li had stunned World Number Two Maria Sharapova of Russia with a straight set, 6-2, 6-2 victory.<br/><br/>In the Men's Singles semi-final yesterday, Britain's Andy Murray defeated World Number Two Roger Federer of Switzerland in a thrilling five set game, 6-4, 6-7, 6-3, 6-7, 6-2. Murray will now face defending champion and World Number One Novak Djokovic of Serbia for the Men's Singles title tomorrow.<br/><br/>Top seed Italian duo of Sara Errani and Roberta Vinci yesterday clinched the Women's Doubles title. They defeated the Aussie team of Ashleigh Barty and Casey Dellacqua, 6-2, 3-6, 6-2.<br/><br/>In the Men's Doubles final match today, top seeded American brothers, Bob and Mike Bryan will clash with the Dutch pair of Robin Haase and Igor Sijsling.