In men's and women's singles competition of the China Masters Grand Prix Gold badminton tournament, Ace India shuttlers H S Prannoy and P V Sindhu entered into the quarterfinals round after posting comfortable straight-game wins today.7th seeded Prannoy beat Malaysia's Daren Liew 21-10, 21-15 and will next take on top seed Chen Long while fourth seeded Sindhu defeated Chinese Taipei's Chien Hui Yu 21-9, 21-17. She will now face Porntip Buranaprasertsuk of Thailand in the quaterfinals.In women's doubles pair of Jwala Gutta and Ashiwini Ponnappa also made into the last eight. Jwala and Ponnappa thrashed Chinese Taipei pair of Hsieh Pei Chen and Wu Ti Jung 21-12, 21-12 to set up a clash with top seeded Chinese duo of Luo Ying and Luo Yu.