Nam, whose latest world ranking is No 552, nine places down compared with last week, will play Ellis Blake of Australia in the first round match, singles category, today.
It is the second time the two players meet each other within a week. Nam defeated Blake 7-5, 6-7, 6-3 in the quarter-finals of the F1 tournament on November 10.
The Vietnamese then lost to Duldaev Daniiar of Kyrgyzstan in the semi-finals on November 11.
On the first day of competition on November 13, national champion Pham Minh Tuan, who received a wild-card, was defeated 1-6, 1-6 by German Ollert Lukas, world No 664.
Apart from Nam and Tuan, Vietnam have two other representatives -- Trinh Linh Giang and Vu Artem -- competing in the singles event.
Giang will meet Lo Chien Hsun of Chinese Taipei and Artem will face Francesco Vilardo of Italy.
In the doubles category, Giang and Tuan will play No 1 duo Daniiar and Fayziev Sanjar of Uzebekistan, while Artem and his partner American Diaz Miguel will face Yutaro Matsuzaki of Japan and Kelsey Steveson of Canada.
