While Sindhu prevailed over Ngan Yi Cheung of Hong Kong 11-21 21-18 21-10 in a three-game women's singles second round match, Gurusaidutt, seeded 11th, beat Riichi Takeshita 21-19 21-16 in 37 minutes.
However, the other Indians in men's singles category -- K Srikanth and Sameer Verma -- lost their respective third round ties to bow out of the tournament. Sindhu took 46 minutes to beat her opponent and will next face seventh seeded Hera Desi of Indonesia later in the day.
Gurusaidutt will take on Iskandar Zulkarnain Zainuddin of Malaysia in the quarterfinals later today.
Meanwhile, Verma lost to Yan Kit Chan 15-21 19-21 in 36 minutes, and Daren Liew, seeded third, took 42 minutes to get the better of Srikanth 21-17 22-20.
Photos: Akshay Kumar, Taapsee Pannu promote 'Naam Shabana'
Flashback: When sexy models sizzled in bikinis at Tokyo fashion show
Photos: These Indian cities top the list in online purchase of sex products
In pictures: Indian-origin artistes in Hollywood
Photos: Varun Dhawan and Alia Bhatt at studio in Bandra