Sen, the Asian junior bronze medalist and a trainee at the Prakash Padukone Academy, had to struggle before getting the better of Chong 21-23 21-10 21-18 in an hour and three minutes for his second successive win over the Malaysian in five days.
The two young shuttlers had met in the final of the USD 8,000 India International Series in Hyderabad on November 26 and Sen won 21-15 17-21 21-17.
In women's singles, sixth seed Sai Uttejitha Rao and no. 7 Reshma Karthik were knocked out by unseeded overseas rivals, M Thinaah of Malaysia and Cheung Ying Mei of Hong Kong respectively.
Fifth seed from Singapore, Chua Hui Zhen Grace, was also shown the exit door by India's Ira Sharma.
Top seed Rituparna Das and no 2 K Sri Krishna Priya, however, moved into the second round.
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