Sixth seed Saina easily overcame U Teng Lok of Macau 21-10, 21-8 in just 20 minutes and lined up against her next opponent Iran's Soraya Aghaeihajiagha, who dispatched Mongolia's Khulangoo Baatar in straight games in another round of 32 women's singles encounter.
Sindhu, seeded 8th, too had a comfortable 21-7, 21-13 first round victory in 19 minutes over Wong Kit Leng, also of Macau, to book a round of 16 clash against M Bellaetrix of Indonesia, a contest the lanky Hyderabadi described as "tricky".
"I am taking it match by match and not looking too far ahead," she said.
Saina said her easy first round victory was expected but things would hot up from round three.
"The first two rounds are generally easy but things would get tougher after that," said the World No. 7.
If Saina sails through to the quarter finals tomorrow, she is likely to face second seed Yan Wihan of China against whom she has a poor 1-8 win-loss ratio.
Two out of three Indian doubles combinations made their exit from the tournament, with only Manu Attri and S Sumeeth Reddy standing to fight another day.
