# 2003 Thailand Open – Singles

Taylor Dent won in the final 6–3, 7–6$^{(7–5)}$ against Juan Carlos Ferrero.

## Seeds

* Juan Carlos Ferrero (final)
* Andy Roddick (withdrew because of a hamstring injury)
* Carlos Moyá (quarterfinals)
* Paradorn Srichaphan (quarterfinals)
* Jarkko Nieminen (semifinals)
* Ivan Ljubičić (semifinals)
* Fabrice Santoro (first round)
* Taylor Dent (champion)

## 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

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Juan Carlos Ferrero | 6 | 6 | | | | |
| 6 | Ivan Ljubičić | 3 | 3 | | | | |
| 6 | Ivan Ljubičić | 3 | 3 | 1 | Juan Carlos Ferrero | 3 | 6$^5$ |
| | | | | 8 | Taylor Dent | 6 | 7$^7$ |
| 5 | Jarkko Nieminen | 6$^3$ | 2 | 8 | Taylor Dent | 6 | 7$^7$ |
| 8 | Taylor Dent | 7$^7$ | 6 | | | | |

### Top half

| 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 |
| 1 | J C Ferrero | 7 | 7$^7$ | | | | | | | | | | | | | | | |
| | D Norman | 5 | 6$^5$ | | 1 | J C Ferrero | 6 | 6$^4$ | 6 | | | | | | | | | |
| | G Galimberti | 3 | 3 | | | A Bogomolov Jr. | 3 | 7$^7$ | 1 | | | | | | | | | |
| | A Bogomolov Jr. | 6 | 6 | | | | | | | 1 | J C Ferrero | 6 | 3 | 7$^7$ | | | | |
| | A Popp | 7 | 6 | | | | | | | | G Carraz | 4 | 6 | 6$^2$ | | | | |
| | W Eschauer | 5 | 3 | | | A Popp | 5 | 2 | | | | | | | | | | |
| | G Carraz | 3 | 7$^{10}$ | 6 | | G Carraz | 7 | 6 | | | | | | | | | | |
| 7 | F Santoro | 6 | 6$^8$ | 1 | | | | | | | | | | | 1 | J C Ferrero | 6 | 6 |
| 4 | P Srichaphan | 0 | 6 | 6 | | | | | | | | | | | 6 | I Ljubičić | 3 | 3 |
| | V Voltchkov | 6 | 3 | 2 | 4 | P Srichaphan | 6 | 7$^7$ | | | | | | | | | | |
| | K Carlsen | 3 | 6 | 7$^7$ | | K Carlsen | 3 | 6$^5$ | | | | | | | | | | |
| WC | A Ram | 6 | 3 | 6$^5$ | | | | | | 4 | P Srichaphan | 6 | 6$^4$ | 5 | | | | |
| Q | M Chiudinelli | 4 | 6 | 3 | | | | | | 6 | I Ljubičić | 4 | 7$^7$ | 7 | | | | |
| | M Ančić | 6 | 4 | 6 | | M Ančić | 1 | 4 | | | | | | | | | | |
| | C Saulnier | 7 | 3 | 6$^4$ | 6 | I Ljubičić | 6 | 6 | | | | | | | | | | |
| 6 | I Ljubičić | 5 | 6 | 7$^7$ | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | J Nieminen | 6 | 6 | | | | | | | | | | | | | | |
| WC | D Udomchoke | 4 | 1 | | 5 | J Nieminen | 6 | 6 | | | | | | | | | |
| | B Ulihrach | 6 | 6 | | | B Ulihrach | 4 | 2 | | | | | | | | | |
| | D Sanguinetti | 2 | 3 | | | | | | 5 | J Nieminen | 6$^5$ | 6 | 6 | | | | |
| | B Vahaly | 7 | 2 | | | | | | 3 | C Moyá | 7$^7$ | 4 | 4 | | | | |
| Q | J Crabb | 5 | 1$^r$ | | | B Vahaly | 5 | 4 | | | | | | | | | |
| Q | P Luxa | 4 | 3 | | 3 | C Moyá | 7 | 6 | | | | | | | | | |
| 3 | C Moyá | 6 | 6 | | | | | | | | | | | 5 | J Nieminen | 6$^3$ | 2 |
| 8 | T Dent | 6 | 6 | | | | | | | | | | | 8 | T Dent | 7$^7$ | 6 |
| | W Moodie | 1 | 4 | | 8 | T Dent | 6 | 6 | | | | | | | | | |
| | I Miranda | 3 | 2 | | | T Ascione | 1 | 2 | | | | | | | | | |
| | T Ascione | 6 | 6 | | | | | | 8 | T Dent | 6 | | | | | | |
| | N Thomann | 5 | 6 | 6 | | | | | | N Thomann | 3 | r | | | | | |
| WC | P Amritraj | 7 | 3 | 3 | | N Thomann | 6 | 6 | | | | | | | | | |
| Q | J Erlich | 7 | 1 | 6 | Q | J Erlich | 4 | 0 | | | | | | | | | |
| LL | S Ratiwatana | 5 | 6 | 4 | | | | | | | | | | | | | |