In a big jolt to India's medal hopes, Babita Kumari lost 5-1 to Maria Prevolaraki of Greece in women's freestyle 53 kilogram individual Round of 16 clash in wrestling. Male wrestlers, including London Olympics Bronze medalist Yogeshwar Dutt, will begin their campaigns later.Earlier, Sakshi Malik opened India's medal count with a dramatic bronze winning effort in freestyle wrestling in 58 kilogram category.In women's golf, Aditi Ashok who began her campaign figuring in Individual Round-2, is now joint leader, as reports last came in.In Athletics, Usain Bolt will be featuring in the Finals of Men's 200 metres today. Bolt is aiming to achieve an unprecedented triple gold immortality.