Top seed and 2018 winner Shi Yu Qi of China dispatched Indonesia's Chico Aura Dwi Wardoyo 21-13, 21-8 while compatriot Li Shi Feng, world number six, came from behind to beat Canadian Brian Yang 21-11, 18-21, 21-16.
But it was end of the road for Sen's compatriot Kiran George, who lost 20-22, 10-21 to Malaysia's Jing Hong Kok.
Star Indian shuttler Lakshya Sen stunned fifth seed Christo Popov of France in straight games to enter the men's singles pre-quarterfinals at the $475,000 Hylo Open Super 500 tournament in Saarbrucken, Germany, on Wednesday.
India secured a dominant 5-0 victory over Macau in their opening group D tie of the Badminton Asia Mixed Team Championship.
Double Olympic medallist PV Sindhu sailed into the pre-quarterfinals but Lakshya Sen made an opening-round exit from the Kumamoto Masters Japan Super 500 tournament in Kumamoto, Japan on Wednesday.
Indian shuttler Kidambi Srikanth opened his campaign at the Thailand Masters badminton tournament with a straight game win over Chinese Taipei's Wang Tzu Wei in Bangkok on Wednesday.
Srikanth outwitted world no. 24 Chinese Taipei's Wang Tzu Wei 21-17, 21-18 in a 43-minute contest.
In the quarterfinals, Lakshya will face Malaysian qualifier Leong Jun Hao.
Manjunath will play Taipei's Yu Jen, who was lucky to progress after fifth seed Rasmus Gemke retired in the second game after pocketing the first.
Indian Mithun Manjunath stunned fourth seed and world number seven Kean Yew Loh of Singapore in the opening round while PV Sindhu and Kidambi Srikanth secured straight-game wins.
Summary of sports events and persons who made news on Sunday
The Indian men's badminton team scripted a memorable 3-2 win over Malaysia to enter the semifinals of Thomas Cup for the first time in 43 years
A summary of sports events and persons who made news on Tuesday.