In the boys' first round, wild card Sinha ousted Otico 6-2 6-2, while in the corresponding round in the girls' section Sabhyata tripped Sawangkaew 4-6 6-4 7-6(2).
In other first round contests, boys' top seed Siddanth Banthia, back in action after an injury lay-off, disposed off T Macherla 6-0 6-2, while Sacchit Sharma rallied from a set down to oust Thailand's Tonkla Mulada 5-7 6-3 6-2.
The tournament is being organised by the HCL in association with the Maharashtra State Lawn Tennis Association at the MSLTA school of tennis courts at the Shri Shiv Chhatrapati Sports Complex, Balewadi, here.
Other results: Boys singles (1st round): Ho Ray (TPE) bt Atharva Sharma(Ind) 6-0, 6-1; 5-Seita Watanabe (JPN) bt Dev Javian (Ind) 6-3, 6-1; 3-Taisei Ichikawa (JPN) bt Siddharth Thakran(Ind) 6-1, 6-2; 7-Dhruv Sunish(Ind) bt Ching Lam (HKG) 6-4, 6-4; Christian Chin (Mas) bt Srivatsa Ratakonda(Ind) 6-3, 6-3; 4-Ryuki Matsuda(JPN) bt Karan Srivastava (Ind) 6-7(4), 6-0, 6-1; 8-Palaphoom Kovapitukted(THA) bt Pariskhit Somani (Ind) 6-2, 6-2; Digvijay Singh (Ind) bt Mritunjay Badola (Ind) 7-5, 6-1; 2-James Trotter (JPN) bt Piyush Salekar(Ind)6-1, 6-1.