Gaurav Bhiduri (52kg), Mandeep Jangra (69kg) and Kuldeep Singh (81kg) bowed out after losing their respective quarterfinal bouts.
Vikas was the first Indian boxer to take the ring today and he advanced to the quarterfinals after a comfortable win over Kanybek Uulu Azamat of Kyrgyzstan.
The former World Championship bronze-medallist was on the top of his defensive game against Azamat.
The Haryana-lad relied on his tried and tested technique of counter-attack. He waited for his rival to drop the guard and then knocked him back with incisive jabs.
With a shell guard which rarely gave Azamat any chance of landing a clear punch, Vikas impressed with his foot movement and his ring craft was duly appreciated by judges, who declared him an unanimous 3-0 winner.
Vikas will face Normatov Hurshidbek of Uzbekistan in the quarterfinal.
While Mandeep lost to Thailand's Saensit Apichet, Bhiduri was beaten by Uzbekistan's Zoirov Shakhobidin. Mandeep faced two knockdown counts during the bout.
Later, Kuldeep, a national champion, went down to Iran's Rouzbahani Ehsan 0-3 to end a poor day for the country's male boxers.
In sharp contrast, all the three women in fray -- M C Mary Kom (51kg), L Sarita Devi (60kg) and Pooja Rani (75kg) -- have assured themselves of medals by advancing to the semifinals.
