The Friendship Cup is a defunct tennis tournament that was played on the Grand Prix Tennis Circuit from 1979-1980. The event was held in San José, Costa Rica and was played on hardcourts.
| Year | Champions | Runners-up | Score |
|---|---|---|---|
| 1979 | Bernard Mitton | Tom Gorman | 6–4, 6–1, 6–3 |
| 1980 | José Luis Clerc | Jimmy Connors | 4–6, 2–6, RET. |
| Year | Champions | Runners-up | Score |
|---|---|---|---|
| 1979 | Guillermo Vilas Ion Ţiriac |
Anand Amritraj Colin Dibley |
6–4, 2–6, 6–4 |
| 1980 | Alvaro Fillol Jaime Fillol |
Anand Amritraj Nick Saviano |
6–2, 7–6 |