Ramkumar, who has had a rough year of late, had toppled Somdev Devvarman in the 2014 Chennai Open.
"We have great faith in Ram. We believe he will go a long way in world tennis. Moreover, India's fans love him and will give him all the support that he needs," TNTA president MA Alagappan said in a release.
The singles field will be led by World number six and 2014 US Open Champion Marin Cilic along with world number 14 Roberto Agut from Spain, No. 27 Albert Ramos-Vinolas (Spain), No. 35 Martin Klizan (Slovakia) and No. 48 Borna Coric (Croatia).