# 2003 Synsam Swedish Open – Singles

Carlos Moyá was the defending champion but lost in the semifinals to Mariano Zabaleta.
Zabaleta won in the final 6–3, 6–4 against Nicolás Lapentti.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Carlos Moyá (semifinals)
* Tommy Robredo (semifinals)
* Younes El Aynaoui (first round)
* Mikhail Youzhny (quarterfinals)
* Mariano Zabaleta (champion)
* Nicolás Lapentti (final)
* Fernando Vicente (first round)
* Alberto Martín (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
| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | C Moyá | 6 | 6$^2$ | 6 | | | | | | | | | | | | | | | | | | | |
| | D Hrbatý | 2 | 7$^7$ | 3 | 1 | C Moyá | 6 | 6 | | | | | | | | | | | | | | | |
| WC | R Söderling | 7 | 6 | | WC | R Söderling | 3 | 4 | | | | | | | | | | | | | | | |
| Q | M Hipfl | 5 | 1 | | | | | | | 1 | C Moyá | 6 | 6 | | | | | | | | | | |
| | J Björkman | 7$^7$ | 6 | | | | | | | | J Björkman | 4 | 3 | | | | | | | | | | |
| | M Puerta | 6$^4$ | 4 | | | J Björkman | 6 | 6 | | | | | | | | | | | | | | | |
| | D Ferrer | 6 | 6 | | | D Ferrer | 2 | 1 | | | | | | | | | | | | | | | |
| 7 | F Vicente | 4 | 3 | | | | | | | | | | | | 1 | C Moyá | 6 | 3 | 4 | | | | |
| 4 | M Youzhny | 7$^7$ | 7$^7$ | | | | | | | | | | | | 5 | M Zabaleta | 2 | 6 | 6 | | | | |
| | O Rochus | 6$^4$ | 6$^1$ | | 4 | M Youzhny | 6 | 5 | 6 | | | | | | | | | | | | | | |
| | F Squillari | 6 | 6 | | | F Squillari | 1 | 7 | 2 | | | | | | | | | | | | | | |
| LL | L Svarc | 4 | 3 | | | | | | | 4 | M Youzhny | 6 | 5 | 1 | | | | | | | | | |
| Q | H Andersson | 3 | 1 | | | | | | | 5 | M Zabaleta | 4 | 7 | 6 | | | | | | | | | |
| WC | B Rehnquist | 6 | 6 | | WC | B Rehnquist | 1 | 2 | | | | | | | | | | | | | | | |
| | N Massú | 6 | 3 | 3 | 5 | M Zabaleta | 6 | 6 | | | | | | | | | | | | | | | |
| 5 | M Zabaleta | 2 | 6 | 6 | | | | | | | | | | | | | | | | 5 | Mariano Zabaleta | 6 | 6 |
| 6 | N Lapentti | 6 | 7 | | | | | | | | | | | | | | | | | 6 | Nicolás Lapentti | 3 | 4 |
| | L Horna | 4 | 5 | | 6 | N Lapentti | 6 | 7$^7$ | | | | | | | | | | | | | | | |
| WC | F Prpic | 6$^2$ | 2 | | | A Voinea | 4 | 6$^5$ | | | | | | | | | | | | | | | |
| | A Voinea | 7$^7$ | 6 | | | | | | | 6 | N Lapentti | 3 | 6 | 7$^8$ | | | | | | | | | |
| Q | R Wassen | 4 | 4 | | | | | | | | R Nadal | 6 | 3 | 6$^6$ | | | | | | | | | |
| | A Portas | 6 | 6 | | | A Portas | 0 | 4 | | | | | | | | | | | | | | | |
| | R Nadal | 6 | 4 | 6 | | R Nadal | 6 | 6 | | | | | | | | | | | | | | | |
| 3 | Y El Aynaoui | 3 | 6 | 3 | | | | | | | | | | | 6 | N Lapentti | 6 | 6 | | | | | |
| 8 | A Martín | 6$^3$ | 3 | | | | | | | | | | | | 2 | T Robredo | 4 | 2 | | | | | |
| | O Mutis | 7$^7$ | 6 | | | O Mutis | 3 | 0 | | | | | | | | | | | | | | | |
| | F Volandri | 6 | 6 | | | F Volandri | 6 | 6 | | | | | | | | | | | | | | | |
| LL | F Browne | 1 | 1 | | | | | | | | F Volandri | 4 | 4 | | | | | | | | | | |
| | H Arazi | 7 | 6 | | | | | | | 2 | T Robredo | 6 | 6 | | | | | | | | | | |
| | M Norman | 5 | 4 | | | H Arazi | 6 | 2 | 4 | | | | | | | | | | | | | | |
| Q | M Sarstrand | 3 | 2 | | 2 | T Robredo | 4 | 6 | 6 | | | | | | | | | | | | | | |
| 2 | T Robredo | 6 | 6 | | | | | | | | | | | | | | | | | | | | |