Nguyen Van Phuong and Trinh Linh Giang won their first match as the host duo defeated Sagar Ahuja and Kelsey Stevenson 6-4, 6-4.
They will next play No 2 seed Shintaro Imai and Yuichi Ito, who trounced Marco Gronimo and Hao Yuan Ng 6-1, 6-3 on September 12.
Another Vietnamese pair Huynh Minh Hung and Le Cong Tien beat Rio Noguchi and Daisuke Sumizama 2-6, 6-4, 11-9 to see Yusuke Takahashi and Renta Tokuda in the second round.
Meanwhile, Vu Artem and Tran Van Hoa were ousted from the tournament. They lost 1-6, 2-6 to Kang Hogi and Oh Chan-yeong. The singles event will kick off today.
Top national player Hoang Nam will play Shinta Fujii of Japan. Linh Giang will meet Choi Seungri. Van Phuong will play against No. 5 seed Bowen Ouyang.
