Manila 1981
Ramesh Krishnan won the title, beating Ivan Dupasquier 6–4 6–4 in the final.
Main draw 32 players
- 2🇺🇸Van WinitskyRound of 32 · Lost to Robert Reininger
- 3🇮🇳Ramesh KrishnanFinal · Champion
- 4🇺🇸Mike CahillRound of 32 · Lost to Jim Gurfein
- 5🇺🇸Marty DavisRound of 32 · Lost to Louk Sanders
- 6🇺🇸Larry StefankiRound of 16 · Lost to Mike Bauer
- 7🇬🇧Jonathan SmithRound of 16 · Lost to Ivan Dupasquier
- 8🇺🇸Jim Delaney#350Round of 32 · Lost to Hans Peter Kandler
- Q🇨🇭Ivan DupasquierFinal · Lost to Ramesh Krishnan
- 🇺🇸Drew GitlinSemifinals · Lost to Ramesh Krishnan
- 🇦🇹Hans KarySemifinals · Lost to Ivan Dupasquier
- 🇺🇸Brad GilbertQuarterfinals · Lost to Drew Gitlin
- 🇦🇺Charlie FancuttQuarterfinals · Lost to Ramesh Krishnan
- 🇺🇸Jim GurfeinQuarterfinals · Lost to Ivan Dupasquier
- 🇺🇸Mike BauerQuarterfinals · Lost to Hans Kary
- 🇵🇭Beejong SissonRound of 16 · Lost to Hans Kary
- 🇺🇸Chris MayotteRound of 16 · Lost to Ramesh Krishnan
- 🇦🇹Hans Peter KandlerRound of 16 · Lost to Charlie Fancutt
- 🇳🇱Louk SandersRound of 16 · Lost to Brad Gilbert
- 🇦🇹Robert ReiningerRound of 16 · Lost to Drew Gitlin
- 🇮🇳Sashi MenonRound of 16 · Lost to Jim Gurfein
- 🇦🇺Alvin GardinerRound of 32 · Lost to Larry Stefanki
- 🇮🇳Anand AmritrajRound of 32 · Lost to Ramesh Krishnan
- 🇺🇸Bob Weise W055Round of 32 · Lost to Jonathan Smith
- 🇺🇸Cary StansburyRound of 32 · Lost to Ivan Dupasquier
- 🇺🇸Chris DunkRound of 32 · Lost to Sashi Menon
- 🇳🇱Eric WilbortsRound of 32 · Lost to Charlie Fancutt
- 🇺🇸Joel BaileyRound of 32 · Lost to Brad Gilbert
- 🇺🇸John BensonRound of 32 · Lost to Hans Kary
- Q🇵🇭Manuel ValleramosRound of 32 · Lost to Beejong Sisson
- Q🇦🇺Peter MacdonaldRound of 32 · Lost to Mike Bauer
- 🇵🇭Romeo RafonRound of 32 · Lost to Chris Mayotte
- 🇦🇺Ross CaseRound of 32 · Lost to Drew Gitlin