Tran Quang Truong beat Kavisha Ratnayaka 3-6, 2-6 in the first singles match.
Tat Thai Nguyen levelled the result, defeating Chaturya Nilawaneera 2-6, 6-2, 6-4 in the second match.
Nguyen and Tu Le Duy Khanh won 6-1, 6-4 over the duo of Ratnayaka and Ashen Silva in the doubles match.
In the Junior Fed Cup, Vietnam place fifth, winning 2-0 over Lebanon.
