Das first defeated Nepalese rival Jitbahadur Muktan 6-0 and then vanquished Cuba's Adrian Andres Puentes Perez 6-4 to enter the pre-quarters where he will face a tough rival in former world no. 5 South Korean archer Lee Seung-Yun on August 12.
Lee was a part of the victorious South Korean outfit that won a gold medal in the team Recurve event at the ongoing Games.
The score was 19-18 and a '10-pointer' would have ensured his place in the last-16 even before his opponent had aimed for his final strike.
Das did not disappoint as he hit the 'Bull's Eye' taking an unassailable lead and winning the final set 29-28.
The Kolkata-based Das defeated his Cuban rival 28-26 29-26 26-27 27-28 29-28.
Earlier in the day, he made short work of Muktan in three straight games with a comprehensive scoreline of 29-26 29-24 30-26, enjoying a fair lead in all three sets including a hat-trick of Perfect 10's in the final game.
The second win in the pool stage has virtually secured India a quarterfinal berth as they rose to the second position with six points.
