Denver 1981
Gene Mayer won the title, beating John Sadri 6–4 6–4 in the final.
Main draw 32 players
- 1🇺🇸Gene MayerFinal · Champion
- 2🇷🇴Ilie NastaseQuarterfinals · Lost to Fritz Buehning
- 3🇺🇸John SadriFinal · Lost to Gene Mayer
- 4🇺🇸Mel PurcellSemifinals · Lost to Gene Mayer
- 5🇺🇸Terry MoorQuarterfinals · Lost to Mel Purcell
- 6🇺🇸Fritz BuehningSemifinals · Lost to John Sadri
- 7🇺🇸Tim GulliksonRound of 32 · Lost to Tom Gullikson
- 8🇺🇸Kevin CurrenRound of 32 · Lost to Tony Giammalva
- 🇺🇸Bruce MansonQuarterfinals · Lost to Gene Mayer
- 🇺🇸Tony GiammalvaQuarterfinals · Lost to John Sadri
- 🇺🇸Andrew PattisonRound of 16 · Lost to Fritz Buehning
- 🇺🇸Butch WaltsRound of 16 · Lost to Tony Giammalva
- 🇦🇺Colin DibleyRound of 16 · Lost to Mel Purcell
- 🇺🇸Ferdi TayganRound of 16 · Lost to Ilie Nastase
- 🇺🇸John AustinRound of 16 · Lost to John Sadri
- 🇺🇸Nick SavianoRound of 16 · Lost to Terry Moor
- 🇦🇺Phil DentRound of 16 · Lost to Gene Mayer
- 🇺🇸Tom GulliksonRound of 16 · Lost to Bruce Manson
- 🇿🇦Bernie MittonRound of 32 · Lost to Ferdi Taygan
- 🇺🇸Chris MayotteRound of 32 · Lost to Bruce Manson
- 🇺🇸Dick StocktonRound of 32 · Lost to Phil Dent
- 🇿🇦Eddie EdwardsRound of 32 · Lost to Fritz Buehning
- 🇨🇱Jaime FillolRound of 32 · Lost to Colin Dibley
- Q🇺🇸Jim Delaney#338Round of 32 · Lost to Ilie Nastase
- 🇺🇸John HayesRound of 32 · Lost to Nick Saviano
- Q🇺🇸Juan FarrowRound of 32 · Lost to John Austin
- 🇺🇸Richard MeyerRound of 32 · Lost to Mel Purcell
- 🇺🇸Robert Vant HofRound of 32 · Lost to Terry Moor
- 🇺🇸Scott DavisRound of 32 · Lost to Andrew Pattison
- Q🇺🇸Steve DentonRound of 32 · Lost to Butch Walts
- 🇺🇸Steve KrulevitzRound of 32 · Lost to John Sadri
- Q🇺🇸Walter RedondoRound of 32 · Lost to Gene Mayer