In another upset, eighth seeded Nidhi Chilumula ousted No.3 Rishika Sunkara 6-3, 6-3 to also book a semi-final berth. Unseeded Sowjanya Bavisetti and second seed Prathana Thombare completed the line-up.
Bhambri, ranked 593, played attacking tennis in the second and the third sets to down Raina in a two-hour-15-minute match.
Raina led 3-1 in the first set, but Bhambri won the next three games for a 4-3 advantage. However, Raina broke back in the seventh and ninth games to win the first set 6-4.
Bhambri dominated the second set breaking Raina twice to win 6-2 and force the decider. The players went 3-all when Bhambri broke Raina and then held serve for 5-3. Another break of serve in the ninth saw Bhambri take the match.
The results (all quarter-finals):
Singles: 6-Prerna Bhambri bt 1-Ankita Raina 4-6, 6-2, 6-3; Sowjanya Bavisetti bt WC-Rutuja Bhosale 6-4, 7-5; 8-Nidhi Chilumula bt 3-Rishika Sunkara 6-3, 6-3; 2-Prarthana Thombare bt 7-Natasha Palha 6-2, 6-7 (4), 6-0.
Doubles: Sowjanya Bavisetti / Sharmada Balu bt Emi Mutaguchi / Chihiro Nunome 6-0, 6-0; Shweta Rana / Rishika Sunkara bt Akshara / Teertha Iska 6-4, 6-1; Rutuja Bhosale / Natasha Palha bt Saniya Madan / Preethi Ujjaini 6-2, 6-0; Ankita Raina / Prarthana Thombare bt Anushka Bhargava / Eetee Mehata 6-2, 7-5.
--IANS (Posted on 09-01-2014)