| 1968-08-29 | US Open | Grass | R64 | - |  Mal Anderson | - |  Pancho J.F. Guzman | 6-1 6-1 6-2 | H2H | 5 | - | - | - | - | - | - | - |
| 1968-06-24 | Wimbledon | Grass | R64 | - | Lew Hoad (7) | - | Pancho J.F. Guzman | 8-6 6-1 6-4 | H2H | 5 | - | - | - | - | - | - | - |
| 1968-06-24 | Wimbledon | Grass | R128 | - | Pancho J.F. Guzman | - |  Robert Lutz | 11-13 1-6 8-6 6-3 6-4 | H2H | 5 | - | - | - | - | - | - | - |
| 1968-06-17 | Queen's Club | Grass | R64 | - |  Roger Taylor | - | Pancho J.F. Guzman | 3-6 6-3 6-2 | H2H | 3 | - | - | - | - | - | - | - |
| 1968-05-11 | Davis Cup SAM SF: VEN vs ECU | Hard | RR | - | Pancho J.F. Guzman | - |  Jorge Andrew | 2-6 6-2 6-3 6-2 | H2H | 5 | - | - | - | - | - | - | - |
| 1968-05-24 | Davis Cup SAM F: ECU vs CHI | Clay | RR | - | Pancho J.F. Guzman | - |  Patricio Cornejo | 3-6 5-7 8-6 6-4 6-3 | H2H | 5 | - | - | - | - | - | - | - |
| 1968-06-07 | Davis Cup AME F: USA vs ECU | Carpet | RR | - | Clark Graebner | - | Pancho J.F. Guzman | 4-6 6-3 6-4 6-4 | H2H | 5 | - | - | - | - | - | - | - |
| 1968-06-07 | Davis Cup AME F: USA vs ECU | Carpet | RR | - | Arthur Ashe | - | Pancho J.F. Guzman | 6-3 6-3 6-2 | H2H | 5 | - | - | - | - | - | - | - |
| 1968-04-15 | Houston-2 | Clay | R16 | - | Pancho J.F. Guzman | - | Jimmy Parker | 6-3 10-8 | H2H | 3 | - | - | - | - | - | - | - |
| 1968-04-15 | Houston-2 | Clay | R32 | - | Pancho J.F. Guzman | - | Jack Jackson | 6-3 8-6 | H2H | 3 | - | - | - | - | - | - | - |
