By surface
| Surface | Thomaz Koch | William Alvarez |
|---|
All meetings (1)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1969-05-16 | ATP | Davis Cup SAM SF: COL vs BRA | Round Robin | — | Thomaz Koch | 6-2 | 7-5 | 6-2 |
| Surface | Thomaz Koch | William Alvarez |
|---|
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1969-05-16 | ATP | Davis Cup SAM SF: COL vs BRA | Round Robin | — | Thomaz Koch | 6-2 | 7-5 | 6-2 |