Indian shuttlers had a good day at Indonesia Masters as four of them, including P V Sindhu and K Srikanth, reached the second round of the Grand Prix Gold tournament in Malang today. Top seed Sindhu, who clinched the Macau Open Grand Prix Gold last week, opened her campaign on a positive note, defeating Indonesia's Gregoria Mariska 21-16 ,19-21, 21-12 in a women's singles match. In the men's singles, top seed Srikanth spanked Indonesia's Wibowo Setyaldi Putra 21-6 ,21-12, while eighth seed R M V Gurusaidutt beat another Indonesian Muhammad Ahdial Octa Khairulloh 21-10 21-3 in another match. Third seed H S Prannoy, who had won the Indonesia Masters title last year saw off Indonesia's Panji Ahmad Maulana 21-16, 21-16.