Delhi girl Bhambri played some flawless tennis to whip an erratic Peangtarn Plipuech of Thailand in straight sets.
Plipuech's gave glimpses of a fight when she broke the Indian in the fifth game of the first set but Bhambri broke back promptly and then again in the 10th game, to win the set 6-4.
The second set was totally one-sided as Bhambri didn't drop a single game on her way to a clash against Kazakhstan's Kamila Kerimbayeva for a berth in the semis.
Mumbai's girl Snehadevi Reddy had no answers to the power of Thailand's Nungnadda Wanasuk, losing 1-6 0-6.
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Sowjanya Bavisetti, another qualifier who had made it to the second round, was outplayed 6-2 6-2 by top seed Magda Linette while Sharmada Balu, also a qualifier, was defeated by third seed Diana Marcinkevica of Latvia 6-4 6-0.
Balu-Bavisetti ended the day on a better note though, as they paired up to beat fourth seeds Tamara Curovic/Diana Marcinkevica 6-7 (1-7) 6-3 10-8 in the doubles quarter-finals.
It was another solid outing for qualifiers Rika Fujiwara from Japan and Keren Shlomo of Israel as they both made it to the last eight.
Singles (2nd round): Magda Linette (Pol) [1] Bt Sowjanya Bavisetti (Ind) 6-2 6-2; Rika Fujiwara (Jpn) Bt Oksana Kalashnikova (Geo) [6] 3-0 Retd; Diana Marcinkevica (Lat) [3] Bt Sharmada Balu (Ind) 6-4 6-0; Nungnadda Wannasuk (Tha) Bt Snehadevi S Reddy (Ind) 6-1 6-0; Keren Shlomo (Isr) Bt Miyabi Inoue (Jpn) 6-3 6-2; Gioia Barbieri (Ita) [4] Bt Anna Shkudun (Ukr) 6-3 6-2; Prerna Bhambri (Ind) Bt Peangtarn Plipuech (Tha) 6-4 6-0; Kamila Kerimbayeva (Kaz) Bt Nicha Lertpitaksinchai (Tha) 5-7 7-5 6-0.