2003 Campionati Internazionali di Sicilia
| 2003 Campionati Internazionali di Sicilia | |
|---|---|
| Date | September 22 – September 28 |
| Edition | 25th |
| Category | International Series |
| Surface | Clay / Outdoor |
| Location | Palermo, Italy |
| Champions | |
| Singles | |
 Nicolás Massú | |
| Doubles | |
 Lucas Arnold / Mariano Hood | |
The 2003 Campionati Internazionali di Sicilia was a men's tennis tournament played on outdoor clay courts in Palermo in Italy and was part of the International Series of the 2003 ATP Tour. It was the 25th edition of the tournament and ran from September 22 through September 28, 2003. Nicolás Massú won the singles title.
Champions
Men's Singles
Nicolás Massú defeated 
Paul-Henri Mathieu 1–6, 6–2, 7–6(7–0)
- It was Massú's 2nd title of the year and the 3rd of his career.
Men's Doubles
Lucas Arnold / Mariano Hood defeated 
František Čermák / Leoš Friedl 7–6 (8–6), 6–7 (3–7), 6–3
- It was Arnold's 2nd title of the year and the 11th of his career. It was Hood's 4th title of the year and the 8th of his career.