Unseeded Rupesh Roy of Bengal upset fifth-seeded Abhijeet Tiwari of Chhattisgarh 6-3, 6-2 in the men’s singles quarterfinals of the National grass-court tennis here on Thursday.

Rupesh will take on sixth-seeded Ramkumar Ramanathan of Tamil Nadu, who produced a tenacious performance to outclass second-seeded Nitten Kirrtane 6-3, 6-4.

In the top-half of the draw, eighth-seeded Saurav Sukul of Bengal breezed past Elwin Anthony of Tamil Nadu 6-3, 6-1 to make the last four stage.

In the women’s quarterfinals, Rushmi Chakravarthi of Tamil Nadu made a remarkable turnaround against a player 17 years younger when she beat Prarthana Thombare of Maharashtra in a tremendous show of tact and endurance.

The results (quarterfinals):

Men: Ronak Manuja (Mah) bt Mohamnmad Fariz (TN) 6-4, 6-0; Saurav Sukul (Ben) bt Elwin Anthony (TN) 6-3, 6-1; Rupesh Roy (Ben) bt Abhijeet Tiwari (Chg) 6-3, 6-2; Ramkumar Ramanathan (TN) bt Nitten Kirrtane (Mah) 6-3, 6-4.

Women: Ankita Raina (Guj) bt Bhuvana Kalva (AP) 4-6, 7-6(3), 6-2; Rushmi Chakravarthi (TN) bt Prarthana Thombare (Mah) 5-7, 6-2, 6-4; Mahita Reddy (AP) bt Nidhi Chilumula (AP) 6-3, 5-7, 7-5; Natasha (Goa) bt Shivika Burman (Ben) 6-2, 4-6, 6-2.

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