Milan 1981
John McEnroe won the title, beating Bjorn Borg 7–6 6–4 in the final.
Main draw 32 players
- 1🇸🇪Bjorn BorgFinal · Lost to John McEnroe
- 2🇺🇸John McEnroeFinal · Champion
- 3🇺🇸Gene MayerQuarterfinals · Lost to Gianni Ocleppo
- 4🇺🇸Brian GottfriedRound of 16 · Lost to Sandy Mayer
- 5🇺🇸John SadriRound of 32 · Lost to Victor Amaya
- 6🇮🇳Vijay AmritrajQuarterfinals · Lost to John McEnroe
- 7🇺🇸Bob LutzRound of 32 · Lost to Stan Smith
- 8🇨🇿Tomas SmidRound of 16 · Lost to Butch Walts
- 🇮🇹Gianni OcleppoSemifinals · Lost to Bjorn Borg
- 🇺🇸Sandy MayerSemifinals · Lost to John McEnroe
- 🇺🇸Butch WaltsQuarterfinals · Lost to Sandy Mayer
- 🇺🇸Stan SmithQuarterfinals · Lost to Bjorn Borg
- 🇺🇸Bill ScanlonRound of 16 · Lost to Bjorn Borg
- 🇧🇷Carlos KirmayrRound of 16 · Lost to Stan Smith
- 🇨🇭Heinz GunthardtRound of 16 · Lost to John McEnroe
- 🇺🇸Peter RennertRound of 16 · Lost to Gene Mayer
- 🇺🇸Tim GulliksonRound of 16 · Lost to Vijay Amritraj
- 🇺🇸Victor AmayaRound of 16 · Lost to Gianni Ocleppo
- 🇮🇹Adriano PanattaRound of 32 · Lost to Carlos Kirmayr
- 🇪🇨Andres GomezRound of 32 · Lost to Gene Mayer
- 🇫🇷Christophe Roger-VasselinRound of 32 · Lost to Bill Scanlon
- 🇺🇸Ferdi TayganRound of 32 · Lost to Vijay Amritraj
- 🇺🇸Fritz BuehningRound of 32 · Lost to Sandy Mayer
- 🇫🇷Jean Francois CaujolleRound of 32 · Lost to Butch Walts
- 🇸🇪Mats WilanderRound of 32 · Lost to Peter Rennert
- 🇮🇹Paolo BertolucciRound of 32 · Lost to Heinz Gunthardt
- 🇲🇽Raul RamirezRound of 32 · Lost to John McEnroe
- Q🇬🇧Richard LewisRound of 32 · Lost to Tomas Smid
- 🇩🇪Rolf GehringRound of 32 · Lost to Brian Gottfried
- Q🇺🇸Tim WilkisonRound of 32 · Lost to Gianni Ocleppo
- 🇺🇸Trey WaltkeRound of 32 · Lost to Bjorn Borg
- 🇭🇷Zeljko FranulovicRound of 32 · Lost to Tim Gullikson