In Rio Olympics today, the whole country will be abuzz with Dipa Karmakar's Vault final in Artistic Gymnastics later this evening. Karmakar is the first Indian, across both genders, to qualify for a Final event in gymnastics at the Summer Games. In her opening round this evening, she will be relying on the Tsukahara vault which consists of a half turn off the springboard onto the vault table, then a push bakwards, usually into a back salt or layout. The mixed pair of Sania Mirza and Rohan Bopanna will fight today in the Bronze medal match against Czech duo of Radek Stepanek and Lucie Hradecka. In shooting, Gagan Narang and Chain Singh will figure in qualifications round in the Men's 50 metre Rifle 3 positions today. The final is slated for later this evening.Indian men's hockey team will figure in the quarter-finals of the event against Belgium tonight. India, the current 5th ranked team in the world, will try to beat the 6th ranked Belgium to make a place in the last-4.In Badminton, India's singles team effort will be led by Saina Nehwal who along with PV Sindhu and K Srikanth will be seen in their second group matches today. A win today will move them to the pre-quarter finals. A loss, however, doesn't mean that they will bow out but their fate will then depend on other ties of the group.Indian boxing is another unit where a medal can be expected. In today's round of 16, pugilist Manoj Kumar will box against Uzbekistan's Fazliddin Gaibnazarov in the 64 kilogram weight class.In Athletics, OP Jaisha and Kavita Raut will be seen in the women's marathon event today.And in the final round of Golf, India's Anirban Lahiri and Shiv Chawrasia will be teeing off.Besides all the action Rio presents, Usain Bolt will be seen in action as semi-final and final of 100m is scheduled for tonight.