India will take on Australia while archrival Pakistan will play against New Zealand in the Twenty20 World Cup semi finals in Durban on Saturday. For India, the fitness of two key players Yuvraj Singh and Mahendra Singh Dhoni is of great concern. While Dhoni is expected to be fully fit, Yuvraj will undergo a fitness test in the morning. India have surprised the bookies and ripped the formbook, eliminating hosts South Africa in the Super Eights.