| 1978-09-15 | Davis Cup EUR PR: EGY vs POR | Clay | RR | - |  Abdel-Gawad Mohammed | - |  Sergio Cruz | 2-6 3-6 6-3 6-2 6-1 | H2H | 5 | - | - | - | - | - | - | - |
| 1977-09-16 | Davis Cup EUR PR: IRL vs POR | Grass | RR | - | Sergio Cruz | - |  Kevin Menton | 7-5 6-4 6-4 | H2H | 5 | - | - | - | - | - | - | - |
| 1977-09-16 | Davis Cup EUR PR: IRL vs POR | Grass | RR | 364 | Sean Sorensen | - | Sergio Cruz | 6-2 6-4 10-8 | H2H | 5 | - | - | - | - | - | - | - |
| 1976-09-24 | Davis Cup EUR PR: POR vs MON | Clay | RR | 291 |  Bernard Balleret | 314 | Sergio Cruz | 5-7 7-5 5-7 6-3 6-2 | H2H | 5 | - | - | - | - | - | - | - |
| 1976-09-24 | Davis Cup EUR PR: POR vs MON | Clay | RR | 342 | Luis Borfiga | 314 | Sergio Cruz | 6-2 6-4 6-3 | H2H | 5 | - | - | - | - | - | - | - |
| 1974-11-11 | Oslo | Hard | R32 | 45 |  Jeff Borowiak | - | Sergio Cruz | 7-5 6-3 | H2H | 3 | - | - | - | - | - | - | - |
| 1974-05-04 | Davis Cup EUR PR: POR vs FRA | Clay | RR | 71 |  Francois Jauffret | - | Sergio Cruz | 6-1 6-0 6-2 | H2H | 5 | - | - | - | - | - | - | - |
| 1974-05-04 | Davis Cup EUR PR: POR vs FRA | Clay | RR | 72 | Georges Goven | - | Sergio Cruz | 6-1 6-1 6-4 | H2H | 5 | - | - | - | - | - | - | - |
| 1974-09-20 | Davis Cup EUR PR: POL vs POR | Clay | RR | - |  Jacek Niedzwiedzki | - | Sergio Cruz | 6-1 6-0 6-2 | H2H | 5 | - | - | - | - | - | - | - |
| 1974-09-20 | Davis Cup EUR PR: POL vs POR | Clay | RR | - | Henrik Drzymalski | - | Sergio Cruz | 6-2 6-1 6-4 | H2H | 5 | - | - | - | - | - | - | - |
