2003 Italian Open – Men's singles
| Men's singles | |
|---|---|
| 2003 Italian Open | |
| Champion | Félix Mantilla | 
| Runner-up | Roger Federer | 
| Score | 7–5, 6–2, 7–6(10–8) | 
| Seeds | 16 | 
Félix Mantilla defeated Roger Federer in the final, 7–5, 6–2, 7–6(10–8) to win the men's singles tennis title at the 2003 Italian Open.
Andre Agassi was the defending champion, but lost in the first round to David Ferrer.