Argentina Open 1978
Jose Luis Clerc won the title, beating Victor Pecci 6–4 6–4 in the final.
Main draw 32 players
- 🇦🇷Jose Luis ClercFinal · Champion
- 🇵🇾Victor PecciFinal · Lost to Jose Luis Clerc
- 🇮🇹Corrado BarazzuttiSemifinals · Lost to Victor Pecci
- 🇺🇸Harold SolomonSemifinals · Lost to Jose Luis Clerc
- 🇧🇷Carlos KirmayrQuarterfinals · Lost to Corrado Barazzutti
- 🇳🇿Chris LewisQuarterfinals · Lost to Harold Solomon
- 🇪🇸Jose HiguerasQuarterfinals · Lost to Victor Pecci
- 🇪🇨Ricardo YcazaQuarterfinals · Lost to Jose Luis Clerc
- 🇺🇸Andrew PattisonRound of 16 · Lost to Jose Higueras
- 🇦🇷Hugo VarelaRound of 16 · Lost to Corrado Barazzutti
- 🇧🇷Joao SoaresRound of 16 · Lost to Harold Solomon
- 🇻🇪Jorge AndrewRound of 16 · Lost to Chris Lewis
- 🇺🇾Jose Luis DamianiRound of 16 · Lost to Victor Pecci
- 🇮🇹Paolo BertolucciRound of 16 · Lost to Ricardo Ycaza
- 🇩🇪Rolf GehringRound of 16 · Lost to Carlos Kirmayr
- 🇩🇪Werner ZirngiblRound of 16 · Lost to Jose Luis Clerc
- 🇩🇪Andreas MaurerRound of 32 · Lost to Ricardo Ycaza
- 🇪🇸Antonio MunozRound of 32 · Lost to Carlos Kirmayr
- 🇨🇱Belus PrajouxRound of 32 · Lost to Corrado Barazzutti
- 🇦🇷Fernando Dalla FontanaRound of 32 · Lost to Paolo Bertolucci
- 🇺🇸George HardieRound of 32 · Lost to Chris Lewis
- 🇧🇷Givaldo BarbosaRound of 32 · Lost to Werner Zirngibl
- 🇨🇱Hans GildemeisterRound of 32 · Lost to Victor Pecci
- 🇨🇴Ivan MolinaRound of 32 · Lost to Andrew Pattison
- 🇨🇱Jaime FillolRound of 32 · Lost to Rolf Gehring
- 🇦🇷Lito AlvarezRound of 32 · Lost to Jorge Andrew
- 🇫🇷Patrice DominguezRound of 32 · Lost to Jose Luis Damiani
- 🇨🇱Patricio CornejoRound of 32 · Lost to Hugo Varela
- 🇦🇺Paul KronkRound of 32 · Lost to Joao Soares
- 🇦🇺Paul McnameeRound of 32 · Lost to Jose Higueras
- 🇦🇷Ricardo CanoRound of 32 · Lost to Jose Luis Clerc
- 🇺🇸Van WinitskyRound of 32 · Lost to Harold Solomon