# 2003 Proximus Diamond Games – Singles

Venus Williams was the defending champion and successfully defended her title by defeating Kim Clijsters 6–2, 6–4 in the final.

## Seeds

The top four seeds receive a bye into the second round.
* Venus Williams (champion)
* Kim Clijsters (final)
* Justine Henin-Hardenne (semifinals)
* Daniela Hantuchová (semifinals)
* Amélie Mauresmo (withdrew due to an adductor strain)
* Jelena Dokic (first round)
* Patty Schnyder (quarterfinals)
* Nathalie Dechy (quarterfinals)
* Alexandra Stevenson (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

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Venus Williams | 6 | 6 | | | | |
| 4 | Daniela Hantuchová | 1 | 4 | | | | |
| 4 | Daniela Hantuchová | 1 | 4 | 1 | Venus Williams | 6 | 6 |
| | | | | 2 | Kim Clijsters | 2 | 4 |
| 3 | Justine Henin-Hardenne | 2 | 6$^3$ | 2 | Kim Clijsters | 2 | 4 |
| 2 | Kim Clijsters | 6 | 7$^7$ | | | | |

### 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 | V Williams | 6 | 6 | | | | | | | | | |
| | D Bedáňová | 2 | 3 | | | M Matevžič | 1 | 1 | | | | | | | | | |
| | M Matevžič | 6 | 6 | | | | | | | 1 | V Williams | 6 | 6 | | | | |
| | T Pisnik | 6 | 4 | 6 | | | | | | | T Pisnik | 1 | 4 | | | | |
| | R Grande | 3 | 6 | 3 | | T Pisnik | 4 | 6 | 6 | | | | | | | | |
| Q | V Razzano | 6 | 6 | | Q | V Razzano | 6 | 3 | 0 | | | | | | | | |
| 9 | A Stevenson | 3 | 2 | | | | | | | | | | | 1 | V Williams | 6 | 6 |
| | | | | | | | | | | | | | | 4 | D Hantuchová | 1 | 4 |
| | | | | | 4 | D Hantuchová | 5 | 6 | 6 | | | | | | | | |
| | E Callens | 6 | 6 | | | E Callens | 7 | 4 | 3 | | | | | | | | |
| Q | D Randriantefy | 1 | 2 | | | | | | | 4 | D Hantuchová | 7$^7$ | 7$^8$ | | | | |
| Q | V Henke | 1 | 1 | | | | | | | 8 | N Dechy | 6$^4$ | 6$^6$ | | | | |
| | J Husárová | 6 | 6 | | | J Husárová | 6 | 3 | 0 | | | | | | | | |
| LL | C Schaul | 4 | 3 | | 8 | N Dechy | 1 | 6 | 6 | | | | | | | | |
| 8 | N Dechy | 6 | 6 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | J Dokic | 5 | 7 | 3 | | | | | | | | | | | | |
| | A Sugiyama | 7 | 5 | 6 | | A Sugiyama | 6 | 6 | | | | | | | | |
| | M Serna | 7$^7$ | 1 | 1 | | A Roesch | 1 | 1 | | | | | | | | |
| | A Roesch | 6$^3$ | 6 | 6 | | | | | | A Sugiyama | 2 | 4 | | | | |
| Q | Z Ondrášková | 6 | 6$^5$ | 6 | | | | | 3 | J Henin-Hardenne | 6 | 6 | | | | |
| | É Loit | 2 | 7$^7$ | 3 | Q | Z Ondrášková | 4 | 6$^2$ | | | | | | | | |
| | | | | | 3 | J Henin-Hardenne | 6 | 7$^7$ | | | | | | | | |
| | | | | | | | | | | | | | 3 | J Henin-Hardenne | 2 | 6$^3$ |
| 7 | P Schnyder | 6 | 6 | | | | | | | | | | 2 | K Clijsters | 6 | 7$^7$ |
| WC | E Clijsters | 2 | 3 | | 7 | P Schnyder | 7 | 6 | | | | | | | | |
| | D Chládková | 6 | 4 | 6 | | D Chládková | 5 | 0 | | | | | | | | |
| | I Benešová | 3 | 6 | 2 | | | | | 7 | P Schnyder | 5 | 1 | | | | |
| WC | K Flipkens | 3 | 5 | | | | | | 2 | K Clijsters | 7 | 6 | | | | |
| | M Casanova | 6 | 7 | | | M Casanova | 3 | 2 | | | | | | | | |
| | | | | | 2 | K Clijsters | 6 | 6 | | | | | | | | |