The Olympic bronze medallist saw off Kristina Gavnholt, world number 41 from Czech Republic, 21-18 21-17 in a 34-minute pre-quarterfinal contest last night. The Indian will next take on seventh seed Japanese Sayaka Sato.
Prannoy, seeded 13th, also prevailed over 2010 Commonwealth Games silver medallist Rajiv Ouseph of England, seeded sixth, 21-13 21-18 to set up a clash with 16th seed Tanongsak Saensomboonsuk of Thailand.
However, India still qualified for the knockout stage as they are placed second behind Japan in Group D after winning against Australia and Germany.
The top two teams in each group make it to the knockout stage and there will be another draw for the quarter-finals.
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The men's team had yet another forgettable day as it proved no match for Indonesia, who dominated the tie to leave India clueless.
World No. 21 Ajay Jayaram could not get across Christie Jonatan, ranked 19th, losing 14-21 12-21 in a 37-minute battle in the first singles.
Manu Attri and Akshay Dewalkar then joined hands and took the court in the first doubles but lost 18-21 17-21 to Angga Pratama and Ricky Karanda Suwardi in just 28 minutes.
In the second doubles, Sumeeth Reddy B and Satwiksairaj Rankireddy were brushed aside by Gideon Markus Fernaldi and Hendra Setiawan 9-21 18-21 and then Sourabh Varma's fight ended with a 10-21 22-20 13-21 loss to Ihsan Maulana Mustofa as Indonesia completed a 5-0 drubbing.