2003 Estoril Open – Men's Singles
| Men's Singles | |
|---|---|
| 2003 Estoril Open | |
| Champion |
 Nikolay Davydenko
|
| Runner-up |
 Agustín Calleri
|
| Final score | 6–4, 6–3 |
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.
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