| 1974-04-19 | Davis Cup WG PR: JPN vs VIE | - | RR | 184 |  Kenichi Hirai | - |  Van-Bay Vo | 6-0 6-3 6-1 | H2H | 5 | - | - | - | - | - | - | - |
| 1973-04-09 | Davis Cup G2 QF: PAK vs VIE | Grass | RR | - | Van-Bay Vo | - |  Saeed Meer | 6-8 6-0 6-3 6-2 | H2H | 5 | - | - | - | - | - | - | - |
| 1973-04-09 | Davis Cup G2 QF: PAK vs VIE | Grass | RR | - | Munawar Iqbal | - | Van-Bay Vo | 6-4 6-4 8-6 | H2H | 5 | - | - | - | - | - | - | - |
| 1973-03-23 | Davis Cup G2 PR: VIE vs SRI | Grass | RR | - | Van-Bay Vo | - | SRISenaka Kumara | 6-4 6-3 4-6 6-4 | H2H | 5 | - | - | - | - | - | - | - |
| 1972-04-08 | Davis Cup WG SF: VIE vs JPN | - | RR | - | Van-Bay Vo | - | Toshiro Sakai | 11-13 6-4 6-2 6-3 | H2H | 5 | - | - | - | - | - | - | - |
| 1972-04-08 | Davis Cup WG SF: VIE vs JPN | - | RR | - | Van-Bay Vo | - | Jun Kamiwazumi | 6-3 8-6 3-6 6-4 | H2H | 5 | - | - | - | - | - | - | - |
| 1972-03-24 | Davis Cup WG QF: VIE vs TPE | - | RR | - | Van-Bay Vo | - |  Fu-Shun Tang | 6-2 6-0 6-0 | H2H | 5 | - | - | - | - | - | - | - |
| 1972-03-24 | Davis Cup WG QF: VIE vs TPE | - | RR | - | Van-Bay Vo | - | Chi-Yuan Lin | 6-0 6-0 6-0 | H2H | 5 | - | - | - | - | - | - | - |
| 1970-04-10 | Davis Cup WG SF: JPN vs VIE | - | RR | - | Isao Kobayashi | - | Van-Bay Vo | 6-4 6-4 9-11 6-2 | H2H | 5 | - | - | - | - | - | - | - |
| 1970-04-10 | Davis Cup WG SF: JPN vs VIE | - | RR | - | Koji Watanabe | - | Van-Bay Vo | 6-2 6-3 6-4 | H2H | 5 | - | - | - | - | - | - | - |
