Saina who won the tournament in both 2009 and 2010 scored a 22-20, 21-18 victory over Ji Hyun Sung of South Korea to enter its final for the fourth straight year while Xuerui pipped compatriot Wang Yihan in the other semi-final.
On Saturday, the World No 5 established a comfortable lead in the first game before Ji Hyun Sung staged a stunning comeback. The latter restored parity at 17 all and even inched ahead to 20-19 but Saina did not give up and reeled off three points to win the game.
She bettered the feat by winning five points in succession when Sung was leading 16-13 in the second game. That probably demoralised the Korean who could not return Saina's forehand smash on match point.