| Singles | |
|---|---|
| 2009 Open GDF Suez | |
| Champion |  Amélie Mauresmo |
| Runner-up |  Elena Dementieva |
| Final score | 7–6(9–7), 2–6, 6–4 |
| Draw | 32 |
| Seeds | 8 |
Anna Chakvetadze was the defending champion, but chose not to participate that year.
Amélie Mauresmo won the title, defeating Elena Dementieva in the final 7–6(9–7), 2–6, 6–4. This was Mauremso's final WTA singles title before her retirement at the end of 2009.
Serena Williams (semifinals, withdrew due to knee injury)
Jelena Janković (semifinals) Elena Dementieva (final)
Agnieszka Radwańska (quarterfinals) Alizé Cornet (quarterfinals)
Patty Schnyder (second round)
Anabel Medina Garrigues (first round) Amélie Mauresmo (champion)| Semifinals | Final | ||||||||||||
| 1 | Serena Williams | ||||||||||||
| 3 | Elena Dementieva | w/o | |||||||||||
| 3 | Elena Dementieva | 67 | 6 | 4 | |||||||||
| 8 | Amélie Mauresmo | 79 | 2 | 6 | |||||||||
| 8 | Amélie Mauresmo | 6 | 0 | 6 | |||||||||
| 2/WC | Jelena Janković | 2 | 6 | 1 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | S Williams | 6 | 6 | ||||||||||||||||||||||||
 I Benešová | 1 | 4 | 1 | S Williams | 6 | 6 | |||||||||||||||||||||
| P Kvitová | 3 | 1 | Q |  K Šprem | 1 | 2 | |||||||||||||||||||||
| Q | K Šprem | 6 | 6 | 1 | S Williams | 6 | 6 | ||||||||||||||||||||
| Q | É Loit | 6 | 6 | Q | É Loit | 4 | 1 | ||||||||||||||||||||
| N Vaidišová | 1 | 4 | Q | É Loit | 2 | 6 | 6 | ||||||||||||||||||||
 K Kanepi | 3 | 6 | 7 | K Kanepi | 6 | 3 | 1 | ||||||||||||||||||||
| 7 | A Medina Garrigues | 6 | 2 | 5 | 1 | S Williams | |||||||||||||||||||||
| 3 | E Dementieva | 6 | 6 | 3 | E Dementieva | w/o | |||||||||||||||||||||
| LL | A Rezaï | 4 | 3 | 3 | E Dementieva | 6 | 6 | ||||||||||||||||||||
| A Pavlyuchenkova | 6 | 6 | A Pavlyuchenkova | 4 | 2 | ||||||||||||||||||||||
| WC | V Razzano | 4 | 1 | 3 | E Dementieva | 6 | 6 | ||||||||||||||||||||
 S Cîrstea | 2 | 6 | 2 | WC | N Dechy | 3 | 2 | ||||||||||||||||||||
| WC | N Dechy | 6 | 1 | 6 | WC | N Dechy | 3 | 6 | 6 | ||||||||||||||||||
 A Bondarenko | 4 | 63 | 6 | P Schnyder | 6 | 4 | 3 | ||||||||||||||||||||
| 6 | P Schnyder | 6 | 77 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | A Mauresmo | 6 | 6 | ||||||||||||||||||||||||
 S Errani | 2 | 0 | 8 | A Mauresmo | 6 | 6 | |||||||||||||||||||||
| T Bacsinszky | 4 | 3 | M Niculescu | 1 | 2 | ||||||||||||||||||||||
| M Niculescu | 6 | 6 | 8 | A Mauresmo | 6 | 6 | |||||||||||||||||||||
| A Kleybanova | 6 | 77 | 4 | A Radwańska | 2 | 0 | |||||||||||||||||||||
 T Pironkova | 2 | 63 | A Kleybanova | 77 | 4 | 2 | |||||||||||||||||||||
| Q | O Lyubtsova | 1 | 1 | 4 | A Radwańska | 65 | 6 | 6 | |||||||||||||||||||
| 4 | A Radwańska | 6 | 6 | 8 | A Mauresmo | 6 | 0 | 6 | |||||||||||||||||||
| 5 | A Cornet | 6 | 6 | 2/WC | J Janković | 2 | 6 | 1 | |||||||||||||||||||
| Q |  A Sevastova | 1 | 3 | 5 | A Cornet | 1 | 6 | 6 | |||||||||||||||||||
| E Makarova | 2 | 2 | WC |  D Hantuchová | 6 | 4 | 2 | ||||||||||||||||||||
| WC | D Hantuchová | 6 | 6 | 5 | A Cornet | 7 | 4 | 4 | |||||||||||||||||||
 Á Szávay | 66 | 2 | 2/WC | J Janković | 5 | 6 | 6 | ||||||||||||||||||||
 N Li | 78 | 6 | N Li | 0 | 6 | 2 | |||||||||||||||||||||
| F Schiavone | 5 | 62 | 2/WC | J Janković | 6 | 3 | 6 | ||||||||||||||||||||
| 2/WC | J Janković | 7 | 77 | ||||||||||||||||||||||||
Justine Henin-Hardenne was the defending champion, but chose not to participate that year.
Amélie Mauresmo was the defending champion, but lost in the quarterfinals to Elena Dementieva.
Ana Ivanovic was the defending champion, but chose to participate in Linz instead.
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Monica Seles was the reigning champion but did not compete that year.
Amélie Mauresmo was the two-time defending champion, and successfully defended her title, defeating Kim Clijsters in the final 6–4, 7–6(7–4) in a rematch of the previous year's final. By winning a third title, Mauresmo received a golden racket decorated with diamonds that is estimated to be worth $1.3 million.
Amélie Mauresmo was the defending champion, but she retired from the sport on 3 December 2009.
Martina Hingis was the defending champion, but lost to Elena Dementieva in the quarterfinals.
Amélie Mauresmo was the defending champion, but withdrew prior to their quarterfinals match against Serena Williams.
Justine Henin was the defending champion, but lost in the semifinals to Eleni Daniilidou.
Amélie Mauresmo was the defending champion and successfully defended her title, defeating Patty Schnyder 2–6, 6–3, 6–4 in the final.
Kim Clijsters was the defending champion, but did not compete this year due to a wrist injury.
Elena Dementieva was the defending champion, but lost in second round to Jelena Kostanić.
Amélie Mauresmo was the defending champion, and successfully defended her title, defeating Kim Clijsters in the final 3–6, 6–3, 6–3.
Amélie Mauresmo was the defending champion, but lost in second round to Anne Kremer.
Kim Clijsters was the defending champion, but was forced to withdraw due to a left ankle injury.
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