Second seed Sumit defeated Jordan's Virender Kumar 5-0, while Sarjubala Devi (51kg) and Pinki Jangra (51kg) advanced to the semis in the women's competition of the USD 100,000 event.
The heavyweight (91kg) top seed, Naman Tanwar, who claimed a bronze at the world youth championships, made an impressive debut in the senior circuit, defeating Jordan's Eishaish Hussein to enter the semifinals and be assured of a medal.
Another impressive win of the day was notched up by reigning national champion Manish Kaushik (60kg), who came up with a spirited show to defeat Cuba's Rabi Armando Martinez.
Top seed Sarjubala assured India of their first medal of the day when she got past Kenya's Christine Ongare 5-0.
The diminutive Manipuri, who is a world championships silver-medallist was in aggressive mode from the first ring of the bell.
She set up a semifinal clash with Mongolian Jargalan Ochirbat, who upstaged 13th seed and former junior world champion Nikhat Zareen in a fiercely-contested clash. Ochirbat won the bout on a split 3-2 verdict.
Also advancing to the medal rounds was Commonwealth Games bronze-medallist Pinki Jangra (51kg). She scored a comprehensive 5-0 triumph over Jordan's Al-Mriheel.
Among the men, world championships quarterfinalist and Asian bronze-medallist Amit Phangal entered the last-eight stage without having to fight after his rival Ramish Rahmani of Afghanistan gave him a walkover.
King's Cup gold-medallist K Shyam Kumar (49kg) also advanced to the quarters but after a draining contest against compatriot Neeraj Swami even though the scoreline read 5-0 in favour of the former.
However, it was heartbreak for world youth champion Sachin Siwach (49kg), who lost a closely-contested bout against Thailand's Thani Narinram.
Earlier, Pooja (69kg) had been assured of a medal after making the semifinal straightaway owing to the small size of her draw.
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