| Singles | |
|---|---|
| 2004 Proximus Diamond Games | |
| Champion |  Kim Clijsters |
| Runner-up |  Silvia Farina Elia |
| Score | 6–3, 6–0 |
Venus Williams was the defending champion, but did not compete this year.
Kim Clijsters won the title by defeating Silvia Farina Elia 6–3, 6–0 in the final.
Two out of the first five seeds (plus two lucky losers) received a bye into the second round.
Justine Henin-Hardenne (withdrew) Kim Clijsters (champion)
Venus Williams (withdrew)
Elena Dementieva (withdrew)
Patty Schnyder (quarterfinals) Francesca Schiavone (withdrew)
Anna Smashnova-Pistolesi (first round) Silvia Farina Elia (final)
Magdalena Maleeva (quarterfinals)
Magüi Serna (first round)| Semifinals | Final | ||||||||||||
 Karolina Šprem | 4 | 5 | |||||||||||
| 8 | Silvia Farina Elia | 6 | 7 | ||||||||||
| 8 | Silvia Farina Elia | 3 | 0 | ||||||||||
| 2 | Kim Clijsters | 6 | 6 | ||||||||||
| LL | Myriam Casanova | 1 | 2 | ||||||||||
| 2 | Kim Clijsters | 6 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| LL |  S Foretz | 77 | 4 | 4 | |||||||||||||||||||||||
 D Chládková | 6 | 6 | D Chládková | 62 | 6 | 6 | |||||||||||||||||||||
| E Gagliardi | 0 | 0 | D Chládková | 4 | 3 | ||||||||||||||||||||||
 C Black | 6 | 4 | 6 | K Šprem | 6 | 6 | |||||||||||||||||||||
| Q | Z Ondrášková | 4 | 6 | 3 | C Black | 4 | 3 | ||||||||||||||||||||
| K Šprem | 6 | 7 | K Šprem | 6 | 6 | ||||||||||||||||||||||
| 7 | A Smashnova-Pistolesi | 1 | 5 | K Šprem | 4 | 5 | |||||||||||||||||||||
| 8 | S Farina Elia | 6 | 7 | ||||||||||||||||||||||||
| 5 | P Schnyder | 65 | 6 | 7 | |||||||||||||||||||||||
| Q | A Stevenson | 3 | 1 | LL |  J Vakulenko | 77 | 4 | 5 | |||||||||||||||||||
| LL | J Vakulenko | 6 | 6 | 5 | P Schnyder | 66 | 0r | ||||||||||||||||||||
| WC | E Callens | 6 | 77 | 8 | S Farina Elia | 78 | 1 | ||||||||||||||||||||
| É Loit | 1 | 63 | WC | E Callens | 6 | 2 | 1 | ||||||||||||||||||||
| M Sánchez Lorenzo | 3 | 0 | 8 | S Farina Elia | 3 | 6 | 6 | ||||||||||||||||||||
| 8 | S Farina Elia | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 10 | M Serna | 4 | 2 | ||||||||||||||||||||||||
| Q | K Koukalová | 6 | 6 | K Koukalová | 6 | 77 | |||||||||||||||||||||
| D Safina | 6 | 6 | D Safina | 4 | 62 | ||||||||||||||||||||||
 A Barna | 4 | 4 | K Koukalová | 6 | 3 | 4 | |||||||||||||||||||||
 T Pisnik | 6 | 3 | 6 | LL | M Casanova | 4 | 6 | 6 | |||||||||||||||||||
 P Mandula | 1 | 6 | 2 | T Pisnik | 1 | 77 | 4 | ||||||||||||||||||||
| LL | M Casanova | 6 | 64 | 6 | |||||||||||||||||||||||
| LL | M Casanova | 1 | 2 | ||||||||||||||||||||||||
| 9 | M Maleeva | 6 | 6 | 2 | K Clijsters | 6 | 6 | ||||||||||||||||||||
| M Pierce | 4 | 4 | 9 | M Maleeva | 6 | 6 | |||||||||||||||||||||
| Q | I Benešová | 7 | 6 | Q | I Benešová | 4 | 4 | ||||||||||||||||||||
 E Daniilidou | 5 | 4 | 9 | M Maleeva | 62 | 2 | |||||||||||||||||||||
| LL | A Parra Santonja | 6 | 6 | 2 | K Clijsters | 77 | 6 | ||||||||||||||||||||
| WC | E Clijsters | 3 | 2 | LL | A Parra Santonja | 3 | 2 | ||||||||||||||||||||
| 2 | K Clijsters | 6 | 6 | ||||||||||||||||||||||||
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