Frankfurt 1981
John McEnroe won the title, beating Tomas Smid 6–2 6–3 in the final.
Main draw 32 players
- 1🇺🇸John McEnroeFinal · Champion
- 2🇺🇸Ivan LendlRound of 16 · Lost to Tomas Smid
- 3🇺🇸Roscoe TannerRound of 16 · Lost to Ilie Nastase
- 4🇺🇸Vitas GerulaitisRound of 16 · Lost to Raul Ramirez
- 5🇺🇸Brian GottfriedRound of 16 · Lost to Heinz Gunthardt
- 6🇵🇱Wojtek FibakRound of 16 · Lost to Stan Smith
- 7🇺🇸Brian TeacherQuarterfinals · Lost to John McEnroe
- 8🇮🇳Vijay AmritrajRound of 32 · Lost to Steve Denton
- 🇨🇿Tomas SmidFinal · Lost to John McEnroe
- 🇨🇭Heinz GunthardtSemifinals · Lost to Tomas Smid
- 🇺🇸Stan SmithSemifinals · Lost to John McEnroe
- 🇺🇸Bob LutzQuarterfinals · Lost to Tomas Smid
- 🇷🇴Ilie NastaseQuarterfinals · Lost to Heinz Gunthardt
- 🇲🇽Raul RamirezQuarterfinals · Lost to Stan Smith
- 🇫🇷Pascal PortesRound of 16 · Lost to John McEnroe
- 🇺🇸Steve DentonRound of 16 · Lost to Bob Lutz
- 🇺🇸Tim WilkisonRound of 16 · Lost to Brian Teacher
- 🇩🇪Andreas MaurerRound of 32 · Lost to Roscoe Tanner
- 🇬🇧Buster C MottramRound of 32 · Lost to John McEnroe
- 🇺🇸Butch WaltsRound of 32 · Lost to Brian Teacher
- 🇮🇱Chaim ArlozorovRound of 32 · Lost to Heinz Gunthardt
- 🇩🇪Christoph ZipfRound of 32 · Lost to Ilie Nastase
- 🇸🇪Jan NorbackRound of 32 · Lost to Tomas Smid
- 🇺🇸John SadriRound of 32 · Lost to Pascal Portes
- 🇺🇸Kevin CurrenRound of 32 · Lost to Brian Gottfried
- 🇸🇪Kjell JohanssonRound of 32 · Lost to Tim Wilkison
- 🇫🇮Leo PalinRound of 32 · Lost to Wojtek Fibak
- 🇦🇺Rod FrawleyRound of 32 · Lost to Raul Ramirez
- 🇮🇪Sean SorensenRound of 32 · Lost to Vitas Gerulaitis
- 🇨🇿Stanislav BirnerRound of 32 · Lost to Stan Smith
- 🇺🇸Tim GulliksonRound of 32 · Lost to Ivan Lendl
- 🇩🇪Wolfgang PoppRound of 32 · Lost to Bob Lutz