# 2003 Breil Milano Indoor – Singles

Davide Sanguinetti was the defending champion but lost in the quarterfinals to Martin Verkerk.
Verkerk won in the final 6–4, 5–7, 7–5 against Yevgeny Kafelnikov.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Jiří Novák (first round)
* Sjeng Schalken (first round)
* Younes El Aynaoui (first round)
* Xavier Malisse (second round)
* Yevgeny Kafelnikov (final)
* Fabrice Santoro (withdrew because of general fatigue)
* Nicolas Escudé (first round)
* Jarkko Nieminen (semifinals)

## 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
| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | J Novák | 4 | 3 | | | | | | | | | | | | | | | | | | | | |
| | R Štěpánek | 6 | 6 | | | R Štěpánek | 6 | 3 | 6$^{13}$ | | | | | | | | | | | | | | |
| WC | R Krajicek | 7 | 6 | | WC | R Krajicek | 3 | 6 | 7$^{15}$ | | | | | | | | | | | | | | |
| | N Davydenko | 5 | 2 | | | | | | | WC | R Krajicek | 6$^7$ | 5 | | | | | | | | | | |
| | V Voltchkov | 6 | 3 | 4 | | | | | | 8 | J Nieminen | 7$^9$ | 7 | | | | | | | | | | |
| | A Dupuis | 4 | 6 | 6 | | A Dupuis | 6$^4$ | 6 | 4 | | | | | | | | | | | | | | |
| | M Kratochvil | 4 | 6 | 1 | 8 | J Nieminen | 7$^7$ | 2 | 6 | | | | | | | | | | | | | | |
| 8 | J Nieminen | 6 | 3 | 6 | | | | | | | | | | 8 | J Nieminen | 6$^8$ | 3 | | | | | | |
| 3 | Y El Aynaoui | 5 | 3 | | | | | | | | | | | 5 | Y Kafelnikov | 7$^{10}$ | 6 | | | | | | |
| WC | A Gaudenzi | 7 | 6 | | WC | A Gaudenzi | 2 | 1 | | | | | | | | | | | | | | | |
| Q | J Björkman | 7 | 6 | | Q | J Björkman | 6 | 6 | | | | | | | | | | | | | | | |
| Q | T Zíb | 5 | 3 | | | | | | | Q | J Björkman | 3 | 4 | | | | | | | | | | |
| WC | H Arazi | 3 | 6 | 3 | | | | | | 5 | Y Kafelnikov | 6 | 6 | | | | | | | | | | |
| | K Pless | 6 | 1 | 6 | | K Pless | 4 | 3 | | | | | | | | | | | | | | | |
| Q | M Charpentier | 2 | 5 | | 5 | Y Kafelnikov | 6 | 6 | | | | | | | | | | | | | | | |
| 5 | Y Kafelnikov | 6 | 7 | | | | | | | | | | | | | | | | 5 | Yevgeny Kafelnikov | 4 | 7 | 5 |
| 7 | N Escudé | 4 | 6 | 3 | | | | | | | | | | | | | | | | Martin Verkerk | 6 | 5 | 7 |
| | D Hrbatý | 6 | 1 | 6 | | D Hrbatý | 7$^7$ | 6$^6$ | 4 | | | | | | | | | | | | | | |
| | I Ljubičić | 7 | 6 | | | I Ljubičić | 6$^3$ | 7$^8$ | 6 | | | | | | | | | | | | | | |
| | O Rochus | 5 | 3 | | | | | | | | I Ljubičić | 6 | 6 | | | | | | | | | | |
| Q | J Varlet | 6 | 6 | | | | | | | Q | J Varlet | 4 | 1 | | | | | | | | | | |
| | F López | 3 | 4 | | Q | J Varlet | 2 | 7 | 7$^8$ | | | | | | | | | | | | | | |
| | A Sá | 4 | 4 | | 4 | X Malisse | 6 | 5 | 6$^6$ | | | | | | | | | | | | | | |
| 4 | X Malisse | 6 | 6 | | | | | | | | | | | | I Ljubičić | 6 | 5 | 6$^1$ | | | | | |
| LL | G Galimberti | 2 | 4 | | | | | | | | | | | | M Verkerk | 3 | 7 | 7$^7$ | | | | | |
| | D Sanguinetti | 6 | 6 | | | D Sanguinetti | 1 | 6 | 7$^{11}$ | | | | | | | | | | | | | | |
| | K Carlsen | 5 | 6 | 0/r | | M Mirnyi | 6 | 3 | 6$^9$ | | | | | | | | | | | | | | |
| | M Mirnyi | 7 | 2 | 4 | | | | | | | D Sanguinetti | 5 | 3 | | | | | | | | | | |
| | M Verkerk | 6 | 6$^3$ | 6 | | | | | | | M Verkerk | 7 | 6 | | | | | | | | | | |
| | A Voinea | 3 | 7$^7$ | 4 | | M Verkerk | 6 | 6 | | | | | | | | | | | | | | | |
| | T Enqvist | 6 | 6 | | | T Enqvist | 3 | 4 | | | | | | | | | | | | | | | |
| 2 | S Schalken | 4 | 3 | | | | | | | | | | | | | | | | | | | | |