# 2003 Italian Open – Men's singles

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.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Andre Agassi (first round)
* Juan Carlos Ferrero (semifinals, retired due to a shoulder injury)
* Carlos Moyá (third round)
* Roger Federer (final)
* Andy Roddick (second round)
* Marat Safin (withdrew due to a left wrist injury)
* Albert Costa (third round)
* Jiří Novák (third round)
* Paradorn Srichaphan (first round)
* Sjeng Schalken (first round)
* David Nalbandian (first round)
* Rainer Schüttler (quarterfinals)
* Sébastien Grosjean (first round)
* Gustavo Kuerten (first round)
* Guillermo Coria (third round)
* Younes El Aynaoui (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final | Final | |
| | Ivan Ljubičić | 6 | 3 | 4 | | | | | | | | | | | | |
| | Félix Mantilla | 3 | 6 | 6 | | | | | | | | | | | | |
| | Félix Mantilla | 3 | 6 | 6 | | Félix Mantilla | 4 | 7$^7$ | 6 | | | | | | | |
| | | | | | | Yevgeny Kafelnikov | 6 | 6$^3$ | 4 | | | | | | | |
| | Yevgeny Kafelnikov | 6 | 7 | | | Yevgeny Kafelnikov | 6 | 6$^3$ | 4 | | | | | | | |
| Q | Martin Verkerk | 3 | 5 | | | | | | | | | | | | | |
| Q | Martin Verkerk | 3 | 5 | | | | | | | | Félix Mantilla | 7 | 6 | 7$^{10}$ | | |
| | | | | | | | | | | 4 | Roger Federer | 5 | 2 | 6$^8$ | | |
| WC | Filippo Volandri | 3 | 7 | 2 | | | | | | | | | | | 4 | Roger Federer | 5 | 2 | 6$^8$ |
| 4 | Roger Federer | 6 | 5 | 6 | | | | | | | | | | | | |
| 4 | Roger Federer | 6 | 5 | 6 | 4 | Roger Federer | 6 | 4 | | | | | | | | |
| | | | | | 2 | Juan Carlos Ferrero | 2 | 2$^r$ | | | | | | | | |
| 12 | Rainer Schüttler | 4 | 4 | | 2 | Juan Carlos Ferrero | 2 | 2$^r$ | | | | | | | | |
| 2 | Juan Carlos Ferrero | 6 | 6 | | | | | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 1 | A Agassi | 6 | 6$^3$ | 4 | | | | | | | | | | | | | | |
| | D Ferrer | 0 | 7$^7$ | 6 | | D Ferrer | 2 | 3 | | | | | | | | | | |
| | I Ljubičić | 6 | 6 | | | I Ljubičić | 6 | 6 | | | | | | | | | | |
| | X Malisse | 2 | 4 | | | | | | | | I Ljubičić | 6 | 6 | | | | | |
| Q | V Hănescu | 7$^7$ | 6 | | | | | | | 15 | G Coria | 4 | 3 | | | | | |
| | M Youzhny | 6$^1$ | 3 | | Q | V Hănescu | 1 | 6$^6$ | | | | | | | | | | |
| | T Henman | 2 | 1 | | 15 | G Coria | 6 | 7$^8$ | | | | | | | | | | |
| 15 | G Coria | 6 | 6 | | | | | | | | | | | | I Ljubičić | 6 | 3 | 4 |
| 11 | D Nalbandian | 3 | 6 | 0 | | | | | | | | | | | F Mantilla | 3 | 6 | 6 |
| | F Mantilla | 6 | 1 | 6 | | F Mantilla | 6 | 6 | | | | | | | | | | |
| | M Fish | 7 | 7 | | | M Fish | 4 | 3 | | | | | | | | | | |
| | F Santoro | 5 | 5 | | | | | | | | F Mantilla | 7 | 4 | 6 | | | | |
| WC | D Sanguinetti | 1 | 3 | | | | | | | 7 | A Costa | 5 | 6 | 1 | | | | |
| | A Clément | 6 | 6 | | | A Clément | 7$^7$ | 2 | 4 | | | | | | | | | |
| Q | Ž Krajan | 4 | 5 | | 7 | A Costa | 6$^3$ | 6 | 6 | | | | | | | | | |
| 7 | A Costa | 6 | 7 | | | | | | | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 3 | C Moyá | 6 | 6 | | | | | | | | | | | | | | |
| | F Vicente | 2 | 4 | | 3 | C Moyá | 6 | 6 | | | | | | | | | |
| | N Lapentti | 6 | 6$^3$ | 3 | | M Mirnyi | 4 | 4 | | | | | | | | | |
| | M Mirnyi | 4 | 7$^7$ | 6 | | | | | | 3 | C Moyá | 4 | 6$^4$ | | | | |
| | B Vahaly | 5 | 6 | 3 | | | | | | | Y Kafelnikov | 6 | 7$^7$ | | | | |
| WC | G Galimberti | 7 | 4 | 6 | WC | G Galimberti | 5 | 1 | | | | | | | | | |
| | Y Kafelnikov | 6 | 1 | 6 | | Y Kafelnikov | 7 | 6 | | | | | | | | | |
| 16 | Y El Aynaoui | 1 | 6 | 4 | | | | | | | | | | | Y Kafelnikov | 6 | 7 |
| 9 | P Srichaphan | 1 | 2 | | | | | | | | | | | Q | M Verkerk | 3 | 5 |
| | J Nieminen | 6 | 6 | | | J Nieminen | 7 | 4 | 6 | | | | | | | | |
| | N Davydenko | 2 | 6 | 7 | | N Davydenko | 5 | 6 | 1 | | | | | | | | |
| | K Kučera | 6 | 1 | 5 | | | | | | | J Nieminen | 0 | 3 | | | | |
| Q | M Verkerk | 6 | 7$^7$ | | | | | | | Q | M Verkerk | 6 | 6 | | | | |
| | V Spadea | 3 | 6$^2$ | | Q | M Verkerk | 6$^6$ | 6 | 6 | | | | | | | | |
| WC | A Gaudenzi | 2 | 3 | | 5 | A Roddick | 7$^8$ | 3 | 4 | | | | | | | | |
| 5 | A Roddick | 6 | 6 | | | | | | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| LL | N Massú | 6 | 2 | 1 | | | | | | | | | | | | | |
| WC | F Volandri | 1 | 6 | 6 | WC | F Volandri | 6 | 7 | | | | | | | | | |
| | R Sluiter | 6 | 4 | 6 | | R Sluiter | 1 | 5 | | | | | | | | | |
| | J-M Gambill | 4 | 6 | 2 | | | | | WC | F Volandri | 6 | 6 | | | | | |
| | R Štěpánek | 6 | 1 | 6 | | | | | | R Štěpánek | 3 | 4 | | | | | |
| | J Blake | 2 | 6 | 3 | | R Štěpánek | 6 | 6 | | | | | | | | | |
| Q | A Martín | 2 | 6 | 6 | Q | A Martín | 4 | 3 | | | | | | | | | |
| 10 | S Schalken | 6 | 3 | 1 | | | | | | | | | WC | F Volandri | 3 | 7 | 2 |
| 13 | S Grosjean | 7$^7$ | 4 | 3 | | | | | | | | | 4 | R Federer | 6 | 5 | 6 |
| | T Robredo | 6$^4$ | 6 | 6 | | T Robredo | 6 | 6 | | | | | | | | | |
| | J I Chela | 6 | 6 | | | J I Chela | 2 | 0 | | | | | | | | | |
| | O Rochus | 1 | 1 | | | | | | | T Robredo | 1 | 1 | | | | | |
| | M Zabaleta | 6 | 6 | | | | | | 4 | R Federer | 6 | 6 | | | | | |
| | D Sánchez | 4 | 2 | | | M Zabaleta | 6$^4$ | 2 | | | | | | | | | |
| | P-H Mathieu | 3 | 5 | | 4 | R Federer | 7$^7$ | 6 | | | | | | | | | |
| 4 | R Federer | 6 | 7 | | | | | | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 8 | J Novák | 6 | 6 | | | | | | | | | | | | | | |
| | W Arthurs | 3 | 3 | | 8 | J Novák | 6 | 6 | | | | | | | | | |
| | D Hrbatý | 6 | 6 | | | D Hrbatý | 1 | 4 | | | | | | | | | |
| Q | T Enqvist | 3 | 3 | | | | | | 8 | J Novák | 4 | 6$^2$ | | | | | |
| | W Ferreira | 3 | 6 | 6 | | | | | 12 | R Schüttler | 6 | 7$^7$ | | | | | |
| | F López | 6 | 4 | 3 | | W Ferreira | 6$^4$ | 2 | | | | | | | | | |
| Q | M Norman | 6$^7$ | 5 | | 12 | R Schüttler | 7$^7$ | 6 | | | | | | | | | |
| 12 | R Schüttler | 7$^9$ | 7 | | | | | | | | | | | 12 | R Schüttler | 4 | 4 |
| 14 | G Kuerten | 3 | 6 | 4 | | | | | | | | | | 2 | J C Ferrero | 6 | 6 |
| | G Gaudio | 6 | 2 | 6 | | G Gaudio | 6 | 6 | | | | | | | | | |
| | A Calleri | 6 | 6 | | | A Calleri | 4 | 2 | | | | | | | | | |
| | S Koubek | 2 | 2 | | | | | | | G Gaudio | 7 | 0 | 2 | | | | |
| Q | A Portas | 6 | 2 | 2 | | | | | 2 | J C Ferrero | 5 | 6 | 6 | | | | |
| | À Corretja | 3 | 6 | 6 | | À Corretja | 4 | 4 | | | | | | | | | |
| Q | M Philippoussis | 6$^3$ | 4 | | 2 | J C Ferrero | 6 | 6 | | | | | | | | | |
| 2 | J C Ferrero | 7$^7$ | 6 | | | | | | | | | | | | | | |