David Nalbandian was the defending champion but did not compete that year. Nikolay Davydenko won in the final 6–4, 6–3 against Agustín Calleri. Seeds Jiří Novák (first round) Rainer Schüttler (first round) Sjeng Schalken (first round) Fernando González (quarterfinals) Tommy Robredo (semifinals) Yevgeny Kafelnikov (quarterfinals) Max Mirnyi (semifinals) Jarkko Nieminen (second round) Draw Finals Top half Bottom half External links 2003 Estoril Open draw 2003 Men's Singles Singles Estoril Open