Saina will now take on compatriot P C Thulasi, who hardly had to break a sweat to overcome USA's Jamie Subandhi 21-16 21-18 in another women's singles first round match.
World No. 9 Saina, seeded sixth in the tournament, lost the first game, but rallied in a fine fashion to beat her unseeded Chinese rival Sun Yu 22-24 21-17 21-10 in her opening round match that lasted an hour and 15 minutes.
In the second game, the Indian started off brilliantly, surging ahead with a 8-0 lead before the Chinese fought back and managed to catch her at 13-13. It was a tense battle for some time to follow, but eventually Saina managed to have the last laugh.
The decider turned out to be a cake walk for India's Olympic bronze medallist shuttler.
Eighth seeded Sindhu, meanwhile, had an easy outing against her unseeded Japanese opponent Aya Ohori, who she defeated 21-16 21-14 in just 31 minutes to set up a second round clash with Nichaon Jindapon of Thailand.