Nguyen Hoang Nam and Pham Cao Hieu managed to both win theirfirst sets in the men's singles but failed to maintain their form.
Namlost to Parupalli Kashyap 22-20, 10-21, 18-21, while Hieu lost to Bhatt Arvind21-16, 7-21, 10-21.
In the third and decisive match, relative newcomerHuynh Vinh, who was making his Thomas Cup debut, lost 13-21, 6-21 in just 20minutes.
In the next round, Vietnam will play Hong Kong, while Indiaface Chinese Taipei.
The Thomas Cup is held every two years. Of the 25Thomas Cup tournaments held since 1948, only three nations have won the title.Indonesia is the most successful team, having won the tournament 14 times.
The current cup holder, China, which did not begin competing until1981, have won seven titles, while Malaysia have won four times./.