Young Indian men's doubles pair of Arjun MR and Ramchandran Shlok and mixed doubles combo of Satwiksairaj Rankireddy and Maneesha K also made it to the main draw.
The 24-year-old Sourabh, who had clinched the Chinese Taipei Masters last year, defeated Israel's Misha Zilberman 21-13 23-21, before edging out Thailand's Pannawit Thongnuam 27-29 21-18 21-18 in a marathon encounter.
The current National Champion from Madhya Pradesh will face Indonesia's Anthony Sinisuka Ginting tomorrow.
The Indian duo will meet Malaysian combo of Yew Sin Ong and Ee Yi Teo next.
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In the mixed doubles, Satwiksairaj Rankireddy and Maneesha K defeated Indonesian combo of Androw Yunanto and Rofahadah Supriadi Putri 21-9 21-12. They then eked out a 21-18 14-21 21-11 win over fellow Indians K Nandagopal and Mahima Aggarwal to enter the main draw.
Satwik and Maneesha will square off against Chinese Taipei's Lu Ching Yao and Chiang Kai Hsin next.
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