Pulling the biggest upset of the day, the 2014 Indonesia Masters winner Prannoy beat Tokyo Olympics gold medallist Viktor Axelsen of Denmark 14-21, 21-19, 21-16 in an intense one hour 11 minutes men's singles second round match.
Down and out in the first game, the Indian shuttler made a stunning comeback to defeat the World no 2. It was Prannoy's first victory in six attempts against Axelsen. He will now face compatriot and former world No 1 Kidambi Srikanth in the quarterfinals.
Also Read | IND v NZ: Prioritising rest, taking mind off the game key for Rachin Ravindra in tight schedule
Former World no.1 Srikanth also came from a game down to beat 2018 Asian Games gold medallist Jonatan Christie of Indonesia 13-21, 21-18, 21-15 in the men's singles second round fixture, which lasted for one hour and two minutes.
Earlier in the day, reigning world champion Sindhu reached the women's singles quarter-finals after beating Spain's Clara Azurmendi in three sets.
The 26-year-old lost the first game but powered back to win the next two to beat Azurmendi 17-21, 21-7, 21-12 in a 47-minute encounter. Sindhu, the two-time Olympic medallist, will now take on Turkey's Neslihan Yigit for a place in the semis.
Also Read | Winter Olympics: Athlete tests Covid positive in Beijing 2022 closed-loop system
Meanwhile, promising youngster Lakshya Sen was knocked out of the Indonesia Masters after losing 13-21 19-21 to the top seed and two-time world champion Kento Momota of Japan in a 46-minute clash.
In the mixed doubles, Dhruv Kapila and N Sikki Reddy also bowed out after losing 15-21, 23-21, 18-21 to Thai team Supak Jomkoh and Supissara Paewsampran. The Indian pair had beaten second seeds and home favourites Praveen Jordan and Melati Oktavianti in the previous round but could not sustain that winning run despite a tough fight.
N Sikki Reddy also bowed out of the women's doubles alongside two-time Olympian Ashwini Ponnappa as the pair went down 18-21, 12-21 to Thai third seeds Jongkolphan Kititharakul and Rawinda Prajongjai. .