St. Louis WCT 1978
Sandy Mayer won the title, beating Eddie Dibbs 7–6 6–4 in the final.
Main draw 32 players
- 1🇺🇸Vitas GerulaitisRound of 16 · Lost to Sandy Mayer
- 2🇺🇸Eddie DibbsFinal · Lost to Sandy Mayer
- 3🇪🇸Manuel OrantesRound of 16 · Lost to Zeljko Franulovic
- 4🇺🇸Dick StocktonQuarterfinals · Lost to John Alexander
- 5🇲🇽Raul RamirezRound of 32 · Lost to Chris Lewis
- 6🇷🇴Ilie NastaseRound of 16 · Lost to John Alexander
- 7🇮🇹Corrado BarazzuttiRound of 32 · Lost to John Newcombe
- 8🇵🇱Wojtek FibakQuarterfinals · Lost to Sandy Mayer
- 🇺🇸Sandy MayerFinal · Champion
- 🇦🇺John AlexanderSemifinals · Lost to Eddie Dibbs
- 🇭🇷Zeljko FranulovicSemifinals · Lost to Sandy Mayer
- 🇳🇿Chris LewisQuarterfinals · Lost to Zeljko Franulovic
- 🇦🇺John NewcombeQuarterfinals · Lost to Eddie Dibbs
- 🇺🇸Bill ScanlonRound of 16 · Lost to Eddie Dibbs
- 🇿🇦Bob HewittRound of 16 · Lost to Wojtek Fibak
- 🇬🇧Mark CoxRound of 16 · Lost to Chris Lewis
- 🇺🇸Peter FlemingRound of 16 · Lost to Dick Stockton
- 🇺🇸Tom GulliksonRound of 16 · Lost to John Newcombe
- 🇮🇹Antonio ZugarelliRound of 32 · Lost to John Alexander
- 🇺🇸Butch WaltsRound of 32 · Lost to Tom Gullikson
- 🇿🇦Cliff DrysdaleRound of 32 · Lost to Manuel Orantes
- 🇦🇺Colin DibleyRound of 32 · Lost to Ilie Nastase
- 🇦🇺Dick CrealyRound of 32 · Lost to Peter Fleming
- 🇺🇸Earl Butch BuchholzRound of 32 · Lost to Bob Hewitt
- 🇿🇦Frew McmillanRound of 32 · Lost to Vitas Gerulaitis
- 🇨🇱Hans GildemeisterRound of 32 · Lost to Wojtek Fibak
- 🇨🇱Jaime FillolRound of 32 · Lost to Sandy Mayer
- 🇪🇸Jose HiguerasRound of 32 · Lost to Eddie Dibbs
- 🇦🇺Ken RosewallRound of 32 · Lost to Dick Stockton
- 🇺🇸Nick SavianoRound of 32 · Lost to Zeljko Franulovic
- 🇺🇸Terry MoorRound of 32 · Lost to Mark Cox
- 🇳🇱Tom OkkerRound of 32 · Lost to Bill Scanlon