# 2003 Tata Open – Singles

Guillermo Cañas was the defending champion but lost in the quarterfinals to Karol Kučera.
Paradorn Srichaphan won in the final 6–3, 6–1 against Kučera.

## Seeds

* Guillermo Cañas (quarterfinals)
* Paradorn Srichaphan (champion)
* Sjeng Schalken (withdrew because of a wrist injury)
* Juan Ignacio Chela (semifinals)
* Andrei Pavel (first round)
* Rainer Schüttler (quarterfinals)
* Lars Burgsmüller (first round)
* Albert Montañés (second 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

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| | Karol Kučera | 6 | 7 | | | | |
| 4 | Juan Ignacio Chela | 3 | 5 | | | | |
| 4 | Juan Ignacio Chela | 3 | 5 | | Karol Kučera | 3 | 1 |
| | | | | 2 | Paradorn Srichaphan | 6 | 6 |
| | Jean-René Lisnard | 2 | 1 | 2 | Paradorn Srichaphan | 6 | 6 |
| 2 | Paradorn Srichaphan | 6 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | G Cañas | 4 | 6 | 6 | | | | | | | | | | | | | |
| | D Norman | 6 | 2 | 3 | 1 | G Cañas | 6 | 6 | | | | | | | | | |
| WC | P Amritraj | 2 | 2 | | | J Vaněk | 4 | 2 | | | | | | | | | |
| | J Vaněk | 6 | 6 | | | | | | | 1 | G Cañas | 1 | 5 | | | | |
| | J Gimelstob | 6 | 6$^3$ | 3 | | | | | | | K Kučera | 6 | 7 | | | | |
| | K Kučera | 3 | 7$^7$ | 6 | | K Kučera | 7$^8$ | 3 | 6 | | | | | | | | |
| | C Mamiit | 6 | 6 | | | C Mamiit | 6$^6$ | 6 | 3 | | | | | | | | |
| 7 | L Burgsmüller | 0 | 3 | | | | | | | | | | | | K Kučera | 6 | 7 |
| 4 | J I Chela | 7$^7$ | 7 | | | | | | | | | | | 4 | J I Chela | 3 | 5 |
| WC | L Paes | 6$^5$ | 5 | | 4 | J I Chela | 3 | 6 | 2 | | | | | | | | |
| WC | R Bopanna | 4 | 6$^3$ | | | Ž Krajan | 6 | 3 | 0$^r$ | | | | | | | | |
| | Ž Krajan | 6 | 7$^7$ | | | | | | | 4 | J I Chela | 6 | 6 | | | | |
| | J Golmard | 1$^r$ | | | | | | | | Q | T Behrend | 4 | 3 | | | | |
| | A Portas | 1 | | | | A Portas | 6$^4$ | 1 | | | | | | | | | |
| Q | T Behrend | 6 | 6 | | Q | T Behrend | 7$^7$ | 6 | | | | | | | | | |
| 5 | A Pavel | 3 | 3 | | | | | | | | | | | | | | |

### Bottom 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | R Schüttler | 6 | 6 | | | | | | | | | | | | | | |
| | J Knowle | 4 | 1 | | 6 | R Schüttler | 6 | 6 | | | | | | | | | |
| Q | M Kohlmann | 6$^3$ | 3 | | | M Philippoussis | 2 | 1 | | | | | | | | | |
| | M Philippoussis | 7$^7$ | 6 | | | | | | | 6 | R Schüttler | 2 | 5 | | | | |
| | K Pless | 2 | 5 | | | | | | | | J-R Lisnard | 6 | 7 | | | | |
| | J-R Lisnard | 6 | 7 | | | J-R Lisnard | 6 | 2 | 6 | | | | | | | | |
| | J Balcells | 5 | 4 | | LL | N Okun | 0 | 6 | 2 | | | | | | | | |
| LL | N Okun | 7 | 6 | | | | | | | | | | | | J-R Lisnard | 2 | 1 |
| 8 | A Montañés | 7$^7$ | 1 | 6 | | | | | | | | | | 2 | P Srichaphan | 6 | 6 |
| | M Llodra | 6$^5$ | 6 | 4 | 8 | A Montañés | 4 | 3 | | | | | | | | | |
| Q | J Varlet | 1 | 5 | | | S Sargsian | 6 | 6 | | | | | | | | | |
| | S Sargsian | 6 | 7 | | | | | | | | S Sargsian | 4 | 4 | | | | |
| | J van Lottum | 6 | 7$^7$ | | | | | | | 2 | P Srichaphan | 6 | 6 | | | | |
| Q | O Patience | 2 | 6$^4$ | | | J van Lottum | 2 | 4 | | | | | | | | | |
| | J Vacek | 5 | 2 | | 2 | P Srichaphan | 6 | 6 | | | | | | | | | |
| 2 | P Srichaphan | 7 | 6 | | | | | | | | | | | | | | |