Long Island 2003
Paradorn Srichaphan won the title, beating James Blake 6–2 6–4 in the final.
Main draw 32 players
- 1🇹🇭Paradorn SrichaphanFinal · Champion
- 2🇧🇷Gustavo KuertenQuarterfinals · Lost to Younes El Aynaoui
- 3🇪🇸Tommy RobredoRound of 16 · Lost to James Blake
- 4🇨🇱Fernando GonzalezRound of 32 · Lost to Juan Ignacio Chela
- 5🇪🇸Felix MantillaRound of 32 · Lost to Mikhail Youzhny
- 6🇦🇷Agustin CalleriRound of 16 · Lost to Jarkko Nieminen
- 7🇲🇦Younes El AynaouiSemifinals · Lost to James Blake
- 8🇪🇸Albert CostaRound of 32 · Lost to Flavio Saretta
- 🇺🇸James BlakeFinal · Lost to Paradorn Srichaphan
- WC🇩🇪Nicolas KieferSemifinals · Lost to Paradorn Srichaphan
- 🇫🇮Jarkko NieminenQuarterfinals · Lost to James Blake
- Q🇺🇸Jeff MorrisonQuarterfinals · Lost to Paradorn Srichaphan
- 🇦🇷Juan Ignacio ChelaQuarterfinals · Lost to Nicolas Kiefer
- 🇧🇷Flavio SarettaRound of 16 · Lost to Nicolas Kiefer
- Q🇸🇰Karol BeckRound of 16 · Lost to Gustavo Kuerten
- 🇷🇺Mikhail YouzhnyRound of 16 · Lost to Jeff Morrison
- 🇧🇪Olivier RochusRound of 16 · Lost to Juan Ignacio Chela
- Q🇿🇦Rik De VoestRound of 16 · Lost to Younes El Aynaoui
- 🇦🇲Sargis SargsianRound of 16 · Lost to Paradorn Srichaphan
- 🇪🇸Alex CorretjaRound of 32 · Lost to Sargis Sargsian
- 🇫🇷Arnaud ClementRound of 32 · Lost to Jeff Morrison
- 🇪🇸David SanchezRound of 32 · Lost to Karol Beck
- LL🇸🇰Dominik HrbatyRound of 32 · Lost to Gustavo Kuerten
- 🇪🇸Feliciano LopezRound of 32 · Lost to Jarkko Nieminen
- Q🇪🇸Fernando VerdascoRound of 32 · Lost to Younes El Aynaoui
- 🇪🇸Fernando VicenteRound of 32 · Lost to Olivier Rochus
- 🇺🇸Jan Michael GambillRound of 32 · Lost to Agustin Calleri
- 🇸🇪Jonas BjorkmanRound of 32 · Lost to James Blake
- 🇦🇷Jose AcasusoRound of 32 · Lost to Tommy Robredo
- WC🇺🇸Michael ChangRound of 32 · Lost to Rik De Voest
- 🇷🇺Nikolay DavydenkoRound of 32 · Lost to Paradorn Srichaphan
- 🇫🇷Paul Henri MathieuRound of 32 · Lost to Nicolas Kiefer