The 17-year-old Radhika, winner of Mumbai leg, beat a rusty Sumitra 6-1, 6-2 in her second round match in the third leg, and will await winner of the tie between Anna Nefedova and Geeta Manohar for her opponent in the last eight round.

India number three Jayalakshmy, who fell on circuit points below Radhika following some dismal performances in the first two legs, was stretched in the first set by Karishma Patel. Jayalakshmy won it on tie-breaker 7-6 (7-3) and in the second, she breezed past Karishma 6-1 to set up a last eight meeting with either Nikita Bhardwaj or Archana Venkatraman.

Second seeded Jayalakshmy, with a break in the fifth game, rushed into 5-4 lead but Karishma came up with some powerful double-fistedcrosscourt winners to draw parity. Jayalakshmy won the tie-breaker 7-3. The second set was a virtual walkover as Karishma gave up meekly to lose in one hour and 33 minutes.

Bangalore-leg winner Shruti Dhawan, carrying a slight back pain that restricted her backhand play, was too good for Nandini Perumal as she won 6-1, 6-2. Fifth seed Sheethal Goutham struggled against blazing sun and some accurate passing shots by Nandini but emerged an eventual 6-3, 6-1 winner.

In first round action, Geeta Manohar caused a small upset when she beat Tara Kanbargimath 7-5, 7-5 in one hour, 45 minutes, in one of the longest matches in Delhi leg.

A confident Radhika raced to a 5-0 lead in first set breaking Sumitra in the second and fourth games. Radhika used her powerful forehand returns to perfection and Sumitra found her down the line passing shots hard to tackle.

The 19-year-old Sumitra looked tired under scorching heat and any points she won were due to Radhika's unforced errors.

After Radhika won the first set6-1, the second was an interesting affair as both the players broke each others' serves for five games before Radhika held on in the sixth. The Pune girl served a few aces to outgun Sumitra.

She led 5-2 in the second set and while serving for the match, Radhika smashed a crosscourt winner to Sumitra's wrong side and the latter did not even attempt it.

Later, she combined with Janaki Krishnamoorthy to upset fourth seeded pair of Nikita Bhardwaj and Harsimran Kaur Bedi to cruise into the quarter-finals of doubles tournament.

Radhik/Janaki pair blanked the fourth seeds 6-0, 6-0 in just under an hour to set up a last-eight tie against Karishma and Nandini, who beat Geeta and Stuti Smit 6-4, 6-3 in another first round match.

Fourth seed Shruti traded a break with Nandini in the first two games of the opening set, but then never looked back as she dished out amazing returns, breaking her opponent in third, fifth and seventh games despite her back problem.

In the second set, both held their serves in thefirst four game before Shruti moved 4-2 ahead with break in sixth. Shruti again outshone Nandini to win the set 6-2.

In the only first round tie remaining, Tara faced a tough challenge from Geeta and finally succumbed 5-7, 5-7 in just under two hours.

The seventh seed gave her best but it was Geeta's day who ran Tara around with long rallies. Geeta should have won the match when she was one set and a match point up. Tara saved once to level 5-5 but then lost the momentum and the match.

In doubles, Kalpita Raje and Sricharanya Thiagrajan beat Mahalingam sisters -- Padma Pritam and Vishnu Pritam -- 6-1, 6-3 and will be up against second seeds Shruti/Sheethal in a quarter-final tie in the bottom half of the draw.

Maharashtra's Radhika Mandke and Sonal Phadke caused further agony to Sumitra and Tara after their singles loss.

Sumitra/Tara were beaten 1-6, 5-7 by Radhika Mandke/Sonal Phadke, who take on top seeded combination of Sai/Rushmi Chakravarthy in the top half of the draw.

Results

Singles(second round): Radhika Tulpule bt Sumitra Rao 6-1, 6-2; Sai Jayalakshmy bt Karishma Patel 7-6 (7-3) 6-1; Shruti Dhawan bt Nandini Perumal 6-1, 6-2; Sheethal Goutham bt Sandhya Kanury 6-3, 6-1.

First round: Geeta Manohar bt Tara Kanbargimath 7-5, 7-5.

Doubles (first round): Radhika Tulpule/Janaki Krishnamoorthy bt Nikita Bhardwaj/Harsimran Kaur Bedi 6-0, 6-0; Karishma Patel/Nandini Perumal bt Geeta Manohar/Stuti Smit 6-4, 6-3; Radhika Mandke/Sonal Phadke bt Tara Kanbargimath/Sumitra Rao 6-1, 7-5; Kalpita Raje/Sricharanya Thiagrajan bt Padma Pritam/Vishnu Pritam Mahalingam 6-1, 6-3.