Fourth seed Prannoy, who had clinched the US Open last month, defeated 10th seed Wei Nan 21-18 21-19 in a 46-minute match, to set up a clash with 11th seed Lin Yu Hsien of Chinese Taipei.
Former National champion and seventh seed Sourabh Verma also reached the quarters after emerging victorious in an all-Indian pre-quarterfinal battle against Parupalli Kashyap.
The 24-year-old from Dhar prevailed over Kashyap 21-18 13-21 21-16 in a close match that last an hour and four minutes at the North Shore Events Centre here.
It was curtains for young Siril Verma after he lost 13-21 14-21 to Chia Hung Lu of Chinese Taipei.
Prannoy had lost to Wei at the Malaysia Open in 2014 but he avenged his loss today after dishing out a gritty performance.
The World No. 17 Indian was leading 9-5 in the opening game but Wei managed to claw back at 10-10 and then earned a slender edge at the break when Prannoy hit long.
Wei moved to 13-10 before Prannoy reeled off five straight points to turn the tables.
In the second game, Wei had a 10-6 advantage but Prannoy erased the deficit and levelled the score at 11-11 when Wei hit wide. What ensued next was a close battle as neither gave an inch and moved neck-and-neck till 16-16.
The Indian then dominated a parallel game and closed it when Wei hit wide again. He then grabbed another point at the net to make it 18-16.
Prannoy continued to move ahead and grabbed two match points with a superb return on his opponent's backhand. The Indian fumbled at the net once but sealed the issue next with a quick net play.
Disclaimer: No Business Standard Journalist was involved in creation of this content
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