U.S. Men's Clay Court Championships 1981
Guillermo Vilas won the title, beating Sammy Giammalva Jr 6–2 6–4 in the final.
Main draw 32 players
- 1🇦🇷Guillermo VilasFinal · Champion
- 2🇦🇷Jose Luis ClercRound of 32 · Lost to Bruce Manson
- 3🇺🇸Harold SolomonQuarterfinals · Lost to Victor Pecci
- 4🇺🇸Johan KriekRound of 32 · Lost to Terry Moor
- 5🇺🇸Eddie DibbsQuarterfinals · Lost to Sammy Giammalva Jr
- 6🇮🇳Vijay AmritrajRound of 32 · Lost to Ramesh Krishnan
- 7🇺🇸Mel PurcellQuarterfinals · Lost to Bruce Manson
- 8🇪🇸Jose HiguerasQuarterfinals · Lost to Guillermo Vilas
- 🇺🇸Sammy Giammalva JrFinal · Lost to Guillermo Vilas
- 🇺🇸Bruce MansonSemifinals · Lost to Sammy Giammalva Jr
- 🇵🇾Victor PecciSemifinals · Lost to Guillermo Vilas
- 🇺🇸Ben MckownRound of 16 · Lost to Harold Solomon
- 🇨🇱Jaime FillolRound of 16 · Lost to Guillermo Vilas
- 🇦🇺Mark EdmondsonRound of 16 · Lost to Mel Purcell
- 🇦🇺Paul KronkRound of 16 · Lost to Bruce Manson
- 🇮🇳Ramesh KrishnanRound of 16 · Lost to Victor Pecci
- 🇺🇸Richard MeyerRound of 16 · Lost to Jose Higueras
- 🇺🇸Rick FagelRound of 16 · Lost to Eddie Dibbs
- 🇺🇸Terry MoorRound of 16 · Lost to Sammy Giammalva Jr
- 🇮🇳Anand AmritrajRound of 32 · Lost to Richard Meyer
- 🇪🇨Andres GomezRound of 32 · Lost to Harold Solomon
- Q🇺🇸Dick StocktonRound of 32 · Lost to Guillermo Vilas
- 🇺🇸Ferdi TayganRound of 32 · Lost to Jose Higueras
- 🇵🇾Francisco GonzalezRound of 32 · Lost to Ben Mckown
- 🇺🇸Hank PfisterRound of 32 · Lost to Victor Pecci
- 🇨🇱Hans GildemeisterRound of 32 · Lost to Mel Purcell
- 🇪🇸Jose Lopez MaesoRound of 32 · Lost to Paul Kronk
- 🇺🇸Nick SavianoRound of 32 · Lost to Sammy Giammalva Jr
- 🇵🇪Pablo ArrayaRound of 32 · Lost to Jaime Fillol
- 🇪🇨Ricardo YcazaRound of 32 · Lost to Mark Edmondson
- 🇺🇸Sherwood StewartRound of 32 · Lost to Rick Fagel
- 🇺🇸Tony GiammalvaRound of 32 · Lost to Eddie Dibbs