| 1972-03-20 | Davis Cup SAM QF: ECU vs COL | Clay | RR | - |  Jairo Velasco Sr | - |  Pancho J.F. Guzman | 2-6 6-3 6-4 6-4 | H2H | 5 | - | - | - | - | - | - | - |
| 1972-03-20 | Davis Cup SAM QF: ECU vs COL | Clay | RR | - | Ivan Molina | - | Pancho J.F. Guzman | 6-3 3-6 7-5 6-0 | H2H | 5 | - | - | - | - | - | - | - |
| 1971-08-09 | Toronto WCT | Clay | R16 | - |  John Newcombe (1) | - | Pancho J.F. Guzman | 6-1 6-3 | H2H | 3 | - | - | - | - | - | - | - |
| 1971-08-09 | Toronto WCT | Clay | R32 | - | Pancho J.F. Guzman | - |  Pat Cramer | 5-7 6-2 7-5 | H2H | 3 | - | - | - | - | - | - | - |
| 1971-07-19 | Clemmons | Clay | R32 | - |  Pierre Barthes | - | Pancho J.F. Guzman | 6-4 4-6 7-6 | H2H | 3 | - | - | - | - | - | - | - |
| 1971-07-19 | Clemmons | Clay | R64 | - | Pancho J.F. Guzman | - |  Sandy Mayer | 6-3 6-3 | H2H | 3 | - | - | - | - | - | - | - |
| 1971-03-26 | Davis Cup SAM QF: ECU vs VEN | Hard | RR | - |  Humphrey Hose | - | Pancho J.F. Guzman | 6-8 6-4 7-5 6-4 | H2H | 5 | - | - | - | - | - | - | - |
| 1971-03-26 | Davis Cup SAM QF: ECU vs VEN | Hard | RR | - | Pancho J.F. Guzman | - | Jorge Andrew | 6-1 6-3 6-0 | H2H | 5 | - | - | - | - | - | - | - |
| 1971-04-16 | Davis Cup SAM SF: BRA vs ECU | Clay | RR | - |  Thomaz Koch | - | Pancho J.F. Guzman | 6-4 6-4 5-7 6-2 | H2H | 5 | - | - | - | - | - | - | - |
| 1971-04-16 | Davis Cup SAM SF: BRA vs ECU | Clay | RR | - | Jose Edison Mandarino | - | Pancho J.F. Guzman | 6-4 4-6 6-3 6-2 | H2H | 5 | - | - | - | - | - | - | - |
