Three-time champion, Saina prevailed over World No. 53 Fitriani 21-11 21-10 in a match that lasted 32 minutes in the second round of women's singles competition here.
Eight seed Saina, who had won the title in 2009, 2010 and 2012, is likely to take on top seed Carolina Marin of Spain in the last eight here.
However, it was the end of the roads for Rio-bound women's doubles and men's doubles pairs of Jwala Gutta and Ashwini Ponnappa, and Manu Attri and B Sumeeth Reddy after they suffered contrasting defeats at the Istora Gelora Bung Karno Stadium earlier today.
Saina, who had beaten Fitriani at the Badminton Asia Championships in April this year, dished out a dominating game which the Indonesian had no clue.
In the opening game, Saina moved to a 9-7 lead and then raced to 14-7 with six consecutive points. The Indian kept marching ahead and soon pocketed the game to earn the bragging rights.
