Both Vishnu and Sanam have played singles as well as doubles matches for India against New Zealand in the Davis Cup. The former has also played in the London Olympics with Paes and paired up with Sania Mirza for the mixed doubles.
The 24-year-old Sanam is a gold medallist in the Asian Games, 2012.
Balaji-Nedunchezhiyan pair has improved their rankings substantially in 2012 and if they continue to perform well, the pair could break into the top 200 in 2013.
The organisers had earlier announced that the country's top doubles specialist players, Leander Paes, Mahesh Bhupathi, and Rohan Bopanna will be participating in the season-opener.
With the inclusion of four more Indian players, the doubles section will see a strong contingent from the country battle for the title.