| 1994-02-04 | Davis Cup G2 QF: PAR vs VEN | Clay | RR | 144 |  Nicolas Pereira | 527 |  Ruben Alvarenga | 7-5 6-3 6-3 | H2H | 5 | - | - | - | - | - | - | - |
| 1994-02-04 | Davis Cup G2 QF: PAR vs VEN | Clay | RR | 537 | Jimy Szymanski | 527 | Ruben Alvarenga | 5-7 7-5 7-5 | H2H | 3 | - | - | - | - | - | - | - |
| 1993-03-26 | Davis Cup G2 SF: PER vs PAR | Clay | RR | 63 |  Jaime Yzaga | 497 | Ruben Alvarenga | 6-3 4-6 6-1 | H2H | 3 | - | - | - | - | - | - | - |
| 1993-03-26 | Davis Cup G2 SF: PER vs PAR | Clay | RR | 316 | Alejandro Aramburu | 497 | Ruben Alvarenga | 6-3 6-4 7-6(2) | H2H | 5 | - | - | - | - | - | - | - |
| 1993-02-05 | Davis Cup G2 QF: DOM vs PAR | Clay | RR | - |  Genaro De Leon | 483 | Ruben Alvarenga | 6-3 6-3 7-5 | H2H | 5 | - | - | - | - | - | - | - |
| 1993-02-05 | Davis Cup G2 QF: DOM vs PAR | Clay | RR | 483 | Ruben Alvarenga | - | Rafael Moreno | 1-6 6-3 6-2 6-4 | H2H | 5 | - | - | - | - | - | - | - |
| 1992-01-31 | Davis Cup G1 QF: PAR vs CUB | Clay | RR | 252 |  Mario Tabares | 437 | Ruben Alvarenga | 6-1 3-6 6-3 | H2H | 3 | - | - | - | - | - | - | - |
| 1992-01-31 | Davis Cup G1 QF: PAR vs CUB | Clay | RR | 518 | Juan Pino | 437 | Ruben Alvarenga | 1-6 7-5 6-4 6-4 | H2H | 5 | - | - | - | - | - | - | - |
| 1991-03-29 | Davis Cup G1 SF: CUB vs PAR | Hard | RR | 246 | Mario Tabares | 964 | Ruben Alvarenga | 6-2 6-1 | H2H | 3 | - | - | - | - | - | - | - |
| 1991-03-29 | Davis Cup G1 SF: CUB vs PAR | Hard | RR | 294 | Juan Pino | 964 | Ruben Alvarenga | 6-1 6-1 5-7 4-6 6-1 | H2H | 5 | - | - | - | - | - | - | - |
