Head to head
All meetings (2)
| 1974 | Davis Cup G1 PR: VIE vs KOR | RR | Van-Thanh Vo | 6-4 4-6 8-6 6-3 | |
| 1969 | Davis Cup G1 SF: KOR vs VIE | RR | Yong-Ho Chung | 6-4 5-7 2-6 6-3 8-6 |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.