While Manoj got the better of Bulgaria's Ismetov Ayrin Smetov 2-1, Sumit stormed past Sandagsuren Erdenebayar of Mongolia 3-0. Both of them will have to win their quarterfinal bouts on Thuursday to be assured of an Olympic berth.
Manoj was the first to take the ring and he rallied to beat Ismetov in his pre-quarterfinal contest. The Indian fought back after losing the opening round against an aggressive rival.
The former Asian bronze-medallist will now face Tajikistan's Rakhimov Shavkatdzhon, who defeated Bahrain's Williams Rashield in his last-16 stage contest.
Sumit, on the other hand, hardly broke a sweat to out-punch Erdenebayar in his prequarterfinal bout. Sumit will next be up against Russia's Petr Khamukov, who got the better of Slovakia's Denis Lazer.
More From This Section
Late last night, former World Championships bronze-medallist Vikas Krishan (75kg) also advanced to the pre-quarterfinals with a 3-0 win over Japan's Takahashi Makoto. The Indian will face Georgia's Kvachatadze Zaal late tonight.
The tournament has 39 qualifying spots up for grabs -- two in the 49kg category, five each in 52kg, 56kg, 60kg, 64kg, 69kg, 75kg and 81kg, and one each in 91kg and +91kg. Over 400 boxers from more than 100 countries are vying for these slots in the final qualifying tournament for amateur boxers.