| Singles | |
|---|---|
| 2005 Proximus Diamond Games | |
| Champion |  Amélie Mauresmo |
| Runner-up |  Venus Williams |
| Final score | 4–6, 7–5, 6–4 |
| Draw | 28 |
| Seeds | 8 |
Kim Clijsters was the defending champion, but lost in quarterfinals to Venus Williams.
Amélie Mauresmo won the title, defeating Williams in the final 4–6, 7–5, 6–4.
The first four seeds received a bye into the second round.
Amélie Mauresmo (champion)
Anastasia Myskina (semifinals) Venus Williams (final)
Alicia Molik (semifinals) Nadia Petrova (second round) Nathalie Dechy (first round)
Patty Schnyder (quarterfinals)
Karolina Šprem (first round)| Semifinals | Final | ||||||||||||
| 1 | Amélie Mauresmo | 6 | 77 | ||||||||||
| 4 | Alicia Molik | 3 | 62 | ||||||||||
| 1 | Amélie Mauresmo | 4 | 7 | 6 | |||||||||
| 3 | Venus Williams | 6 | 5 | 4 | |||||||||
| 3 | Venus Williams | 6 | 3 | 6 | |||||||||
| 2 | Anastasia Myskina | 3 | 6 | 3 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | A Mauresmo | 6 | 6 | ||||||||||||||||||||||||
 I Benešová | 2 | 1 | M Pierce | 4 | 1 | ||||||||||||||||||||||
| M Pierce | 6 | 6 | 1 | A Mauresmo | 4 | 6 | 6 | ||||||||||||||||||||
| Q | C Pin | 6 | 6 | 7 | P Schnyder | 6 | 4 | 3 | |||||||||||||||||||
 M Marrero | 1 | 2 | Q | C Pin | 3 | 6 | 1 | ||||||||||||||||||||
| D Chládková | 3 | 5 | 7 | P Schnyder | 6 | 4 | 6 | ||||||||||||||||||||
| 7 | P Schnyder | 6 | 7 | 1 | A Mauresmo | 6 | 77 | ||||||||||||||||||||
| 4 | A Molik | 3 | 62 | ||||||||||||||||||||||||
| 4 | A Molik | 4 | 6 | 79 | |||||||||||||||||||||||
 M Maleeva | 6 | 6 | M Maleeva | 6 | 2 | 67 | |||||||||||||||||||||
 T Garbin | 4 | 4 | 4 | A Molik | 6 | 6 | |||||||||||||||||||||
| LL |  C Schaul | 6 | 6 | K Koukalová | 3 | 4 | |||||||||||||||||||||
| WC |  E Callens | 3 | 4 | LL | C Schaul | 4 | 3 | ||||||||||||||||||||
| K Koukalová | 79 | 6 | K Koukalová | 6 | 6 | ||||||||||||||||||||||
| WC/6 | N Dechy | 67 | 4 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | N Petrova | 6 | 6 | ||||||||||||||||||||||||
| A Medina Garrigues | 4 | 1 | 5 | N Petrova | 5 | 77 | 1 | ||||||||||||||||||||
| K Clijsters | 6 | 6 | K Clijsters | 7 | 63 | 6 | |||||||||||||||||||||
| J Kostanić | 2 | 3 | K Clijsters | 2 | 3 | ||||||||||||||||||||||
| Q |  A Ivanovic | 3 | 6 | 3 | 3 | V Williams | 6 | 6 | |||||||||||||||||||
| WC | V Razzano | 6 | 2 | 6 | WC | V Razzano | 3 | 0 | |||||||||||||||||||
| 3 | V Williams | 6 | 6 | ||||||||||||||||||||||||
| 3 | V Williams | 6 | 3 | 6 | |||||||||||||||||||||||
| 8 | K Šprem | 5 | 3 | 2 | A Myskina | 3 | 6 | 3 | |||||||||||||||||||
| Q | A Chakvetadze | 7 | 6 | Q | A Chakvetadze | 6 | 1 | 612 | |||||||||||||||||||
| ME Camerin | 6 | 2 | 4 | Q |  K Srebotnik | 4 | 6 | 714 | |||||||||||||||||||
| Q | K Srebotnik | 3 | 6 | 6 | Q | K Srebotnik | 66 | 2 | |||||||||||||||||||
| T Golovin | 6 | 610 | 6 | 2 | A Myskina | 78 | 6 | ||||||||||||||||||||
| D Safina | 4 | 712 | 3 | T Golovin | 3 | 78 | 4 | ||||||||||||||||||||
| 2 | A Myskina | 6 | 66 | 6 | |||||||||||||||||||||||
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