Nagal outclassed his second-round rival Paramveer Singh Bajwa, a qualifier, 6-2, 6-0 to set up a quarterfinal clash Jayesh Pungliya, who edged out Korea's Seong-Gook Oh 7-5, 7-6(4).
Rawat made short work of qualifier Anvit Bendre, beating him 6-3, 6-4.
Colin van Beem of the Netherlands, seeded three, was in good form as he annihilated Ju-Hae Moon of Korea conceding only two games. He now meets another Korean, 8th-seed Tae-Woo Lee in the quarterfinals.
Results (Indians unless otherwise specified): Men's singles (2nd round): Sumit Nagal (1) bt Paramveer Singh Bajwa 6-2, 6-0; Jayesh Pungliya bt Seong-Gook Oh (Kor) 7-5, 7-6(4); Arjun Kadhe bt Kelsey Stevenson (Canada) 6-7(4), 6-1, 6-1; Cameron Silverman (USA) (7) bt Aryan Goveas 6-2, 7-5.
Tae-Woo Lee (Kor) (8)bt Cing-Yang Meng (Taipei) 6-3, 6-2; Colin van Beem (Neth) (3) bt Ju-Hae Moon (Korea) 6-1, 6-1; Haadin Bava (5) bt Vijayant Malik 6-3, 6-3; Sidharth Rawat (2) bt Anvit Bendre 6-3, 6-4.
Disclaimer: No Business Standard Journalist was involved in creation of this content