The first set went on serve till it reached the tie breaker, where Vijayragavan was lucky towards the end as he took the set 7-5.
In the second, Sood took a quick lead of 3-1 from where Vijayragavan came back and dominated the next five games to wrap up the match in three hours and 35 minutes.
Third seed Vishnu Vardhan had a tough time before overcoming unseeded Mohammad Fariz 7-6 (4) 6-4.
Men's singles: Shaikh Abdullah (AP) b Sagar Ahuja (MAH) 6-7(7) 6-2 6-4; Ashwin Vijayragavan (AP) b Lakshit Sood (UP) (8) 7-6 (5) 6-3; Vishnu Vardhan (TN) (3) b Mohammad Fariz (TN) 7-6 (4) 6-4.
Women's singles: Sri Vaishnavi Peddi Reddy (AP) b M Arthi (TN) 6-4 6-1; Nithyaraj Baburaj (TN) (8) b Kanishka Chawla 6-2 6-1; Sharmada Balu (KAR) (4) b Sonal Phadke (MAH) 6-2 6-1; Namita Bal (MAH) b Varunya Chandrasekhar (KAR) 1-4 retd; Nidhi Chilumula (AP) (3) b Sanya Madan (UP) 6-2 6-3; C Sai Samitha (TN) (6) b Anjali Thakur (MP) 6-3 6-2; Shalaka Uddur Manjunath (KAR) b Amala Amol Warrick (KAR) 7-6 (3) 6-1.