Isao Watanabe
| Country | JPN |
|---|---|
| Born | 1941-11-23 |
| Plays | Right-handed |
| Career W–L | 6–8 |
| Titles | 0 |
| Career-high rank | No. 274 (1974-12-23) |
| Matches in database | 14 |
No narrative sections yet — career facts below.
| Country | JPN |
|---|---|
| Born | 1941-11-23 |
| Plays | Right-handed |
| Career W–L | 6–8 |
| Titles | 0 |
| Career-high rank | No. 274 (1974-12-23) |
| Matches in database | 14 |
No narrative sections yet — career facts below.