Mario Kindelan, the defending Olympic lightweight champion moved comfortably into the quarterfinals with a clear and controlled 24-9 points win over Pakistan's Ali Shah. The Cuban will face Azerbaijan's Rovshan Huseynov, who defeated American Vicente Escobedo 36-18
Earlier, Iranian boxer Mohammad ASHERI and Domenico VALENTINO (ITA), who both had byes in the preliminary round, did battle, with the Italian going through to the quarterfinals, taking a 37-18 decision.
Tough Kazakhstani puncher Serik Yeleouv booked his place in the last eight with a 28-16 win over the Dominion Republic's Felix Diaz, while Jong Sub Baik defeated Mongolian Munkh Erdene by 33-22.
In a tight battle that went right to the wire Uganda's Sam Rukundo edged out Puerto Rican Alex de Jesus 24-22.
In the final bout of the first session Russian Murat Khrachev outclassed Australian Anthony Little 29-20. The bout was stopped in the third session.