Cologne 1981
Ivan Lendl won the title, beating Sandy Mayer 6–3 6–3 in the final.
Main draw 32 players
- 1🇺🇸Ivan LendlFinal · Champion
- 2🇨🇿Tomas SmidSemifinals · Lost to Sandy Mayer
- 3🇺🇸Sandy MayerFinal · Lost to Ivan Lendl
- 4🇩🇪Rolf GehringRound of 32 · Lost to Joao Soares
- 5🇺🇸Bob LutzRound of 32 · Lost to Sammy Giammalva Jr
- 6🇧🇷Carlos KirmayrRound of 32 · Lost to Tim Wilkison
- 7🇺🇸Kevin CurrenQuarterfinals · Lost to Tomas Smid
- 8🇮🇱Shlomo GlicksteinRound of 16 · Lost to Andrew Pattison
- 🇺🇸Sammy Giammalva JrSemifinals · Lost to Ivan Lendl
- 🇺🇸Andrew PattisonQuarterfinals · Lost to Ivan Lendl
- 🇿🇦Eddie EdwardsQuarterfinals · Lost to Sammy Giammalva Jr
- 🇺🇸Tim WilkisonQuarterfinals · Lost to Sandy Mayer
- Q🇨🇿Jaroslav NavratilRound of 16 · Lost to Ivan Lendl
- 🇺🇸Jeff BorowiakRound of 16 · Lost to Tomas Smid
- 🇨🇿Jiri HrebecRound of 16 · Lost to Sammy Giammalva Jr
- 🇧🇷Joao SoaresRound of 16 · Lost to Eddie Edwards
- 🇺🇸Matt DoyleRound of 16 · Lost to Sandy Mayer
- 🇩🇪Peter ElterRound of 16 · Lost to Tim Wilkison
- 🇺🇸Tony GiammalvaRound of 16 · Lost to Kevin Curren
- 🇪🇸Angel GimenezRound of 32 · Lost to Kevin Curren
- 🇩🇪Hans SchwaierRound of 32 · Lost to Andrew Pattison
- Q🇩🇪Hartmut KirchhubelRound of 32 · Lost to Jiri Hrebec
- 🇨🇿Jan KodesRound of 32 · Lost to Tony Giammalva
- Q🇨🇿Jiri GranatRound of 32 · Lost to Sandy Mayer
- Q🇩🇪Karl MeilerRound of 32 · Lost to Tomas Smid
- 🇺🇸Nick SavianoRound of 32 · Lost to Ivan Lendl
- 🇨🇭Roland StadlerRound of 32 · Lost to Shlomo Glickstein
- 🇳🇿Russell SimpsonRound of 32 · Lost to Matt Doyle
- 🇨🇿Stanislav BirnerRound of 32 · Lost to Jaroslav Navratil
- 🇺🇸Steve DentonRound of 32 · Lost to Jeff Borowiak
- 🇺🇸Trey WaltkeRound of 32 · Lost to Eddie Edwards
- 🇩🇪Ulrich PinnerRound of 32 · Lost to Peter Elter