Nations Cup 1978
Jose Higueras won the title, beating John Newcombe 6–2 6–3 in the final.
Main draw 8 players
- 🇪🇸Jose HiguerasFinal · Champion
- 🇪🇸Manuel OrantesFinal · Champion
- 🇦🇺John NewcombeFinal · Lost to Jose Higueras
- 🇦🇺Phil DentFinal · Lost to Manuel Orantes
- 🇮🇹Adriano PanattaSemifinals · Lost to Phil Dent
- 🇺🇸Harold SolomonSemifinals · Lost to Jose Higueras
- 🇮🇹Paolo BertolucciSemifinals · Lost to John Newcombe
- 🇺🇸Roscoe TannerSemifinals · Lost to Manuel Orantes