Estoril Open 2003
Nikolay Davydenko won the title, beating Agustin Calleri 6–4 6–3 in the final.
Main draw 32 players
- 1🇨🇿Jiri NovakRound of 32 · Lost to John Van Lottum
- 2🇩🇪Rainer SchuettlerRound of 32 · Lost to Feliciano Lopez
- 3🇳🇱Sjeng SchalkenRound of 32 · Lost to Nikolay Davydenko
- 4🇨🇱Fernando GonzalezQuarterfinals · Lost to Agustin Calleri
- 5🇪🇸Tommy RobredoSemifinals · Lost to Agustin Calleri
- 6🇷🇺Yevgeny KafelnikovQuarterfinals · Lost to Nikolay Davydenko
- 7🇧🇾Max MirnyiSemifinals · Lost to Nikolay Davydenko
- 8🇫🇮Jarkko NieminenRound of 16 · Lost to Agustin Calleri
- 🇷🇺Nikolay DavydenkoFinal · Champion
- 🇦🇷Agustin CalleriFinal · Lost to Nikolay Davydenko
- 🇪🇸Feliciano LopezQuarterfinals · Lost to Max Mirnyi
- LL🇪🇸Galo BlancoQuarterfinals · Lost to Tommy Robredo
- 🇷🇴Adrian VoineaRound of 16 · Lost to Yevgeny Kafelnikov
- 🇩🇪Alexander WaskeRound of 16 · Lost to Nikolay Davydenko
- WC🇵🇹Bernardo MotaRound of 16 · Lost to Feliciano Lopez
- Q🇮🇱Harel LevyRound of 16 · Lost to Tommy Robredo
- 🇳🇱John Van LottumRound of 16 · Lost to Galo Blanco
- 🇦🇷Jose AcasusoRound of 16 · Lost to Fernando Gonzalez
- Q🇷🇴Victor HanescuRound of 16 · Lost to Max Mirnyi
- 🇪🇸Alberto Martin#364Round of 32 · Lost to Max Mirnyi
- 🇮🇹Andrea GaudenziRound of 32 · Lost to Tommy Robredo
- Q🇧🇪Christophe RochusRound of 32 · Lost to Victor Hanescu
- 🇪🇸David FerrerRound of 32 · Lost to Fernando Gonzalez
- 🇪🇸David SanchezRound of 32 · Lost to Jose Acasuso
- WC🇵🇹Diogo RochaRound of 32 · Lost to Agustin Calleri
- Q🇪🇸Fernando VerdascoRound of 32 · Lost to Galo Blanco
- LL🇦🇷Gaston EtlisRound of 32 · Lost to Alexander Waske
- WC🇵🇹Helder LopesRound of 32 · Lost to Jarkko Nieminen
- 🇬🇪Irakli LabadzeRound of 32 · Lost to Yevgeny Kafelnikov
- 🇳🇱Martin VerkerkRound of 32 · Lost to Harel Levy
- 🇳🇱Raemon SluiterRound of 32 · Lost to Bernardo Mota
- 🇦🇺Wayne ArthursRound of 32 · Lost to Adrian Voinea