The qualifying singles rounds will be played on Friday and Saturday at the SDAT Stadium. Four places are up for grabs in the singles main draw, and the result of these two days will determine which four players make it to the 28-player field of the 20th edition of India's most premier and South Asia's only ATP World Tour event.
The qualifying singles round is a draw of 16 with 14 direct acceptances and two wildcards.
Sanam was granted a wildcard into the qualifying singles draw earlier this week, but has now gained direct entry into the qualifying main draw.
In his place, Prajnesh Gunneswaran has been given a wildcard into the qualifying singles draw along with N Vijay Sundar Prashanth.
Complete qualifying singles draw is: Luca Vanni (Italy, 107 ranking); Jan-Lennard Struff (Germany, 108); Elias Ymer (Sweden, 136); Blaz Kavcic (Slovenia, 151); James Ward (Great Britain, 156); Thomas Fabiano (Italy, 157); Alexander Kudryavtsev (Russia, 164); Ante Pavic (Croatia, 166); Hans Podlipnik-Castillo (Chile, 170); Saketh Myneni (India, 171); Somdev Devvarman (India, 180); Jozef Kovalik (Slovakia, 259); Sanam Singh (India, 279); Matthew Barton (Australia, 299); N Vijay Sundar Prasanth (India, 378); Prajnesh Gunneswaran (India, 484).