Fifth seed Prasanth beat Vijayaraghavan 7-6(1), 5-7, 6-2.
Prasanth faces qualifier Weerapat Doakmaiklee of Thailand in the pre-quarterfinals tomorrow.
Top seed V M Ranjeet defeated Perakiat Siriluethaiwattana of Thailand 7-5, 6-3, while another Indian Saketh Myneni beat compatriot Ronit Singh Bist 6-1 6-1.
Following are the second round results: Hyun-Woo Nam (KOR) bt Chih-JenHO (TPE) 6-1, 6-1; Ranjeet Virali-Murugesan (IND) bt Perakiat Siriluethaiwattana (THA) 7-5, 6-3; Weerapat Doakmaiklee (THA) bt Vivek Shokeen (IND) 6-4, 7-6(6); N Vijay Sundar Prasanth (IND) by Ashwin Vijayragavan (IND) 7-6(1), 5-7, 6-2; Suk-Young Jeong (KOR) bt Kunal Anand (IND) 6-1, 6-0; Chieh-Fu Wang (TPE) bt Abhijeet Tiwari (IND) 4-6, 6-3, 6-2; Chandril Sood (IND) bt Tejas Chaukulkar (IND) 6-2, 6-3; Bastien Favier (FRA) bt Rishabdev Raman (IND) 6-3, 6-4; Saketh Myneni (IND) bt Ronit Singh Bisht (IND) 6-1, 6-1; Elbert Sie (INA) bt Lakshit Sood (IND) 6-0, 6-0; Antoine Escoffier (FRA) bt Arjun Kadhe (IND) 6-3, 6-3; Kaza Vinayak Sharma (IND) bt Ajai Selvaraj (IND) 6-2, 6-4; Karunuday Singh (IND) bt Zach Itzstein (AUS) 6-4, 6-7(6), 7-5.