Winnetka CH 1998
Geoff Grant won the title, beating Diego Nargiso 5–7 6–3 7–5 in the final.
Main draw 32 players
- 1🇮🇳Leander PaesRound of 32 · Lost to Chris Groer
- 2🇮🇹Diego NargisoFinal · Lost to Geoff Grant
- 3🇺🇸Alex ObrienRound of 32 · Lost to Mark Knowles
- 4🇺🇸Brian MacphieRound of 32 · Lost to Scott Humphries
- 5🇮🇹Cristiano CarattiRound of 16 · Lost to Takao Suzuki
- 6🇺🇸Michael SellRound of 32 · Lost to David Wheaton
- 7🇧🇷Andre SaQuarterfinals · Lost to Diego Nargiso
- 8🇺🇸Geoff GrantFinal · Champion
- 🇺🇸David WheatonSemifinals · Lost to Diego Nargiso
- Q🇺🇸Scott HumphriesSemifinals · Lost to Geoff Grant
- 🇦🇺Lleyton HewittQuarterfinals · Lost to Geoff Grant
- WCBAHMark KnowlesQuarterfinals · Lost to David Wheaton
- 🇯🇵Takao SuzukiQuarterfinals · Lost to Scott Humphries
- 🇦🇺Ben EllwoodRound of 16 · Lost to Scott Humphries
- Q🇺🇸Chris GroerRound of 16 · Lost to Lleyton Hewitt
- 🇿🇦David NainkinRound of 16 · Lost to David Wheaton
- Q🇺🇸Mashiska WashingtonRound of 16 · Lost to Diego Nargiso
- 🇨🇴Mauricio HadadRound of 16 · Lost to Andre Sa
- WC🇺🇸Michael RussellRound of 16 · Lost to Geoff Grant
- 🇺🇸Wade McguireRound of 16 · Lost to Mark Knowles
- 🇫🇷Antony DupuisRound of 32 · Lost to Mauricio Hadad
- 🇺🇸David WittRound of 32 · Lost to Wade Mcguire
- 🇯🇵Gouichi MotomuraRound of 32 · Lost to Cristiano Caratti
- WC🇺🇸James BlakeRound of 32 · Lost to Michael Russell
- 🇫🇷Jean Francois BachelotRound of 32 · Lost to Takao Suzuki
- 🇿🇦Justin BowerRound of 32 · Lost to Geoff Grant
- 🇦🇺Mark DraperRound of 32 · Lost to Ben Ellwood
- Q🇻🇪Maurice RuahRound of 32 · Lost to Mashiska Washington
- 🇧🇾Max MirnyiRound of 32 · Lost to Diego Nargiso
- 🇮🇱Noam BehrRound of 32 · Lost to Lleyton Hewitt
- 🇺🇸Oren MotevasselRound of 32 · Lost to David Nainkin
- WC🇺🇸Patrick McEnroeRound of 32 · Lost to Andre Sa