San Jose 1978
Arthur Ashe won the title, beating Bernie Mitton 6–7 6–1 6–2 in the final.
Main draw 32 players
- 1🇺🇸Sandy MayerRound of 16 · Lost to Trey Waltke
- 2🇺🇸Roscoe TannerSemifinals · Lost to Arthur Ashe
- 3🇺🇸John McEnroeSemifinals · Lost to Bernie Mitton
- 4🇺🇸Arthur AsheFinal · Champion
- 5🇺🇸Hank PfisterRound of 16 · Lost to Bernie Mitton
- 7🇿🇦Byron BertramQuarterfinals · Lost to Roscoe Tanner
- 8🇺🇸Bill ScanlonRound of 32 · Lost to Erik Van Dillen
- 🇿🇦Bernie MittonFinal · Lost to Arthur Ashe
- 🇺🇸Eliot TeltscherQuarterfinals · Lost to Arthur Ashe
- 🇺🇸Erik Van DillenQuarterfinals · Lost to John McEnroe
- 🇺🇸Trey WaltkeQuarterfinals · Lost to Bernie Mitton
- 🇧🇷Carlos KirmayrRound of 16 · Lost to Eliot Teltscher
- 🇺🇸Gene MayerRound of 16 · Lost to Arthur Ashe
- 🇺🇸John AustinRound of 16 · Lost to Roscoe Tanner
- 🇺🇸Rick FisherRound of 16 · Lost to Erik Van Dillen
- 🇦🇺Steve DochertyRound of 16 · Lost to John McEnroe
- 🇺🇸Van WinitskyRound of 16 · Lost to Byron Bertram
- 🇨🇱Alvaro FillolRound of 32 · Lost to Byron Bertram
- 🇺🇸Billy MartinRound of 32 · Lost to Trey Waltke
- 🇺🇸Bruce MansonRound of 32 · Lost to Van Winitsky
- 🇺🇸Charlie PasarellRound of 32 · Lost to Rick Fisher
- 🇺🇸George HardieRound of 32 · Lost to Arthur Ashe
- 🇨🇦Greg HalderRound of 32 · Lost to John Austin
- 🇬🇧John FeaverRound of 32 · Lost to Steve Docherty
- 🇦🇺John JamesRound of 32 · Lost to Roscoe Tanner
- 🇲🇽Marcello LaraRound of 32 · Lost to Hank Pfister
- 🇬🇧Mike WaymanRound of 32 · Lost to Carlos Kirmayr
- 🇺🇸Peter PearsonRound of 32 · Lost to Sandy Mayer
- 🇪🇨Ricardo YcazaRound of 32 · Lost to Gene Mayer
- 🇬🇧Richard LewisRound of 32 · Lost to Bernie Mitton
- 🇳🇿Russell SimpsonRound of 32 · Lost to John McEnroe
- LL🇺🇸Vincent Van PattenRound of 32 · Lost to Eliot Teltscher