It was a mixed day for Indian shuttlers in the Vietnam Open Grand Prix badminton tournament in Ho Chi Minh City on Thursday.While Sameer Verma advanced to the men's singles quarterfinals of the 50,000 US Dollar tournament beating Shreyansh Jaiswal in three games 20-22, 26-24, 21-17.The Indian mixed pair of Arun Vishnu and Aparna Balan lost to Indonesian duo of Alfian Eko Prasetya and Annisa Saufika 9-21, 20-22 in just half an hour.It was also curtains for the men's doubles duo of Akshay Dewalkar and Pranaav Jerry Chopra, who surrendered 21-12, 21-14 in just 35 minutes, to Kaixiang Huang and SijieWang of China.