Nam lost the first set 4-6 but came back to dominate in the second and third sets (6-3, 6-0) to secure the victory.
Earlier in the first round, Nam defeated China’s Zhou Sheng Hao 6-1, 6-1.
Nam will face the winner of the clash between Ubiergo Jordan of France and Onozawa Arata from Japan in the quarterfinals.
