The Olympic bronze medallist today sealed the final spot after notching up a 21-13 21-18 win over China's Yihan Wang, a 2011 World Champion and 2012 London Olympics silver medallist, in the semifinals.
Up against one of her toughest rivals, who has beaten her nine times, Saina showed her prowess as he fought back from 2-4 down in the opening game and prevailed in a gruelling battle in the second to outclass Wang.
The top seeded Indian will next take on Olympic champion Li Xuerui of China, an opponent against whom she has lost nine times and the only wins coming during the 2012 Indonesia Open and Singapore Open Super Series in 2010.
After the interval, Wang caught up at 11-11 but Saina changed gears, and a seven-point burst from 14-13 helped her to pocket the opening game.
The second game turned out to be a thriller as lead exchanged hands too frequently. Saina lead 9-6 at one stage and even though Wang clawed back at 10-10, the Indian wrested a slender 13-11 lead soon.