Somdev Devvarman and Praksh Amritraj moved to the pre-quarterfinals of the $1,25,000 ATP Challenger event in Seoul, Korea after winning their respective first round matches.
Fourth seed Somdev advanced after his South African opponent Rik de Voest conceded his match when the Indian was leading 6-3 2-0.
Prakash, on the other hand, scripted a convincing 6-3 6-1 win over local lad Kyu Tae IM.
Prakash though has a tough task at hand as he will take on second seed and Taipei Davis Cupper Yen-Hsun Lu in the second round.
Somdev will fight it out against Pavol Cervenak of Slovakia.