San Juan 1981
Eliot Teltscher won the title, beating Tim Gullikson 6–4 6–2 in the final.
Main draw 32 players
- 1🇺🇸Eliot TeltscherFinal · Champion
- 2🇺🇸Tim GulliksonFinal · Lost to Eliot Teltscher
- 3🇺🇸Sandy MayerSemifinals · Lost to Eliot Teltscher
- 4🇵🇾Francisco GonzalezSemifinals · Lost to Tim Gullikson
- 5🇦🇹Peter FeiglRound of 32 · Lost to Sashi Menon
- 6🇺🇸John HayesRound of 32 · Lost to David Schneider
- 7🇮🇳Anand AmritrajRound of 32 · Lost to Freddie De Jesus
- 8🇺🇸Chris MayotteRound of 16 · Lost to Tim Mayotte
- PURFreddie De JesusQuarterfinals · Lost to Sandy Mayer
- 🇺🇸George HardieQuarterfinals · Lost to Tim Gullikson
- 🇮🇳Sashi MenonQuarterfinals · Lost to Eliot Teltscher
- 🇺🇸Tim MayotteQuarterfinals · Lost to Francisco Gonzalez
- 🇺🇸Ben TestermanRound of 16 · Lost to Sandy Mayer
- 🇺🇸Charlie OwensRound of 16 · Lost to Francisco Gonzalez
- 🇺🇸Cliff SkakleRound of 16 · Lost to Eliot Teltscher
- Q🇺🇸David SchneiderRound of 16 · Lost to George Hardie
- 🇺🇸Manuel DiazRound of 16 · Lost to Freddie De Jesus
- 🇬🇧Robin DrysdaleRound of 16 · Lost to Tim Gullikson
- 🇺🇸Steve KrulevitzRound of 16 · Lost to Sashi Menon
- 🇺🇸Ben MckownRound of 32 · Lost to Ben Testerman
- Q🇺🇸Brad GilbertRound of 32 · Lost to Charlie Owens
- 🇲🇽Emilio MontanoRound of 32 · Lost to George Hardie
- Q🇺🇸Eric FrommRound of 32 · Lost to Eliot Teltscher
- Q🇦🇹Filip KrajcikRound of 32 · Lost to Tim Gullikson
- 🇺🇸Jeff BorowiakRound of 32 · Lost to Chris Mayotte
- 🇨🇱Juan NunezRound of 32 · Lost to Robin Drysdale
- 🇭🇷Marko OstojaRound of 32 · Lost to Steve Krulevitz
- 🇺🇸Michael GrantRound of 32 · Lost to Tim Mayotte
- 🇺🇸Mike CahillRound of 32 · Lost to Cliff Skakle
- 🇺🇸Rick FisherRound of 32 · Lost to Francisco Gonzalez
- PURRicky DiazRound of 32 · Lost to Manuel Diaz
- 🇺🇸Sammy Giammalva JrRound of 32 · Lost to Sandy Mayer