| Singles | |
|---|---|
| 2011 Roma Open | |
| Champion |  Simone Bolelli |
| Runner-up |  Eduardo Schwank |
| Final score | 2–6, 6–1, 6–3 |
Federico del Bonis was the defending champion, but decided not to participate this year.
Simone Bolelli won the title, defeating Eduardo Schwank 2–6, 6–1, 6–3 in the final.
Tobias Kamke (quarterfinals) Julian Reister (first round) Mischa Zverev (first round, retired) Andreas Beck (withdrew with back injury)
Benoît Paire (second round) Björn Phau (first round)
Thomas Schoorel (second round)
Gilles Müller (second round)| Semifinals | Final | ||||||||||||
| Dustin Brown | 6 | 4 | 4 | ||||||||||
| Eduardo Schwank | 1 | 6 | 6 | ||||||||||
| Eduardo Schwank | 6 | 1 | 3 | ||||||||||
| WC | Simone Bolelli | 2 | 6 | 6 | |||||||||
| WC | Simone Vagnozzi | 2 | 63 | ||||||||||
| WC | Simone Bolelli | 6 | 7 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | T Kamke | 6 | 7 | ||||||||||||||||||||||||
 K Kravchuk | 1 | 63 | 1 | T Kamke | 6 | 6 | |||||||||||||||||||||
| M Gicquel | 4 | 6 | 4 | A di Mauro | 4 | 3 | |||||||||||||||||||||
| A di Mauro | 6 | 2 | 6 | 1 | T Kamke | 6 | 3 | 3 | |||||||||||||||||||
| D Brown | 6 | 4 | 7 | D Brown | 1 | 6 | 6 | ||||||||||||||||||||
| A Clément | 2 | 6 | 62 | D Brown | 6 | 4 | 6 | ||||||||||||||||||||
| WC | M Trevisan | 4 | 4 | 5 | B Paire | 3 | 6 | 1 | |||||||||||||||||||
| 5 | B Paire | 6 | 6 | D Brown | 6 | 4 | 4 | ||||||||||||||||||||
| 3 | M Zverev | 2r | E Schwank | 1 | 6 | 6 | |||||||||||||||||||||
 A Ungur | 5 | A Ungur | 3 | 5 | |||||||||||||||||||||||
| E Schwank | 6 | 6 | E Schwank | 6 | 7 | ||||||||||||||||||||||
| Q |  JS Cabal | 4 | 2 | E Schwank | 6 | 6 | |||||||||||||||||||||
 P Capdeville | 61 | 5 | J Acasuso | 1 | 2 | ||||||||||||||||||||||
| J Acasuso | 7 | 7 | J Acasuso | 4 | 6 | 7 | |||||||||||||||||||||
 R Bemelmans | 3 | 7 | 3 | 7 | T Schoorel | 6 | 4 | 5 | |||||||||||||||||||
| 7 | T Schoorel | 6 | 5 | 6 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | B Phau | 4 | 1 | ||||||||||||||||||||||||
| É Roger-Vasselin | 6 | 6 | É Roger-Vasselin | ||||||||||||||||||||||||
| WC | N Massú | 6 | 3 | 2 | WC | S Vagnozzi | w/o | ||||||||||||||||||||
| WC | S Vagnozzi | 3 | 6 | 6 | WC | S Vagnozzi | 6 | 6 | |||||||||||||||||||
| R Farah | 2 | 66 | Q |  P Carreño-Busta | 2 | 4 | |||||||||||||||||||||
 P Luczak | 6 | 7 | P Luczak | 1 | 6 | 1 | |||||||||||||||||||||
| Q | P Carreño-Busta | 6 | 6 | Q | P Carreño-Busta | 6 | 1 | 6 | |||||||||||||||||||
| LL | B Knittel | 1 | 3 | WC | S Vagnozzi | 2 | 63 | ||||||||||||||||||||
| 8 | G Müller | 4 | 7 | 6 | WC | S Bolelli | 6 | 7 | |||||||||||||||||||
| Q | Andrea Arnaboldi | 6 | 64 | 4 | 8 | G Müller | 4 | 65 | |||||||||||||||||||
 M Fischer | 7 | 6 | M Fischer | 6 | 7 | ||||||||||||||||||||||
| D Guez | 5 | 3 | M Fischer | 4 | 2 | ||||||||||||||||||||||
| P Lorenzi | 6 | 6 | WC | S Bolelli | 6 | 6 | |||||||||||||||||||||
| Q | C Salamanca | 3 | 3 | P Lorenzi | 4 | 4 | |||||||||||||||||||||
| WC | S Bolelli | 7 | 6 | WC | S Bolelli | 6 | 6 | ||||||||||||||||||||
| 2 | J Reister | 65 | 4 | ||||||||||||||||||||||||
Juan Carlos Ferrero defeated Martin Verkerk in the final, 6–1, 6–3, 6–2 to win the men's singles tennis title at the 2003 French Open.
Roger Federer defeated James Blake in the final, 6–1, 6–4, to win the men's singles title at the 2007 Cincinnati Masters.
The 1999 Open Gaz de France singles was the singles event of the seventh edition of the Open GDF Suez; a WTA Tier II tournament held in Paris, France. Mary Pierce was the defending champion but did not compete that year.
Anastasia Myskina was the defending champion, but chose not to participate that year.
Caroline Wozniacki was the defending champion, but was defeated in the fourth round by Ana Ivanovic.
Agnieszka Radwańska was the defending champion, but lost 6–0, 6–3 in the semifinals to the eventual champion Serena Williams.
Polona Hercog was the two-time defending champion, but decided to compete at an ITF $100,000 event at Olomouc instead.
World No. 1 Serena Williams won the title, defeating Johanna Larsson in the final, 6–4, 6–1.
Tomáš Berdych was the defending champion, but chose not to compete.
Grigor Dimitrov won the title, defeating David Ferrer in the final, 2–6, 6–3, 6–4.
Elena Vesnina was the defending champion, but she retired in the second round against Estrella Cabeza Candela.
Garbiñe Muguruza won her first WTA singles title, defeating Klára Zakopalová in the final, 6–4, 6–0.
Anastasia Pavlyuchenkova was the defending champion, but lost to Svetlana Kuznetsova in the final, 2–6, 1–6.
Viktor Troicki was the defending champion and successfully defended his title, defeating Grigor Dimitrov in the final, 2–6, 6–1, 7–6(9–7).
Elina Svitolina was the defending champion, but chose not to participate this year.
Irina-Camelia Begu was the defending champion, but lost in the second round to Jana Čepelová.
This is the first edition of the tournament.
Stan Wawrinka was the defending champion and successfully defended his title, defeating Mischa Zverev in the final, 4–6, 6–3, 6–3.
Tomáš Berdych was the two-time defending champion, but withdrew before the competition began.
Svetlana Kuznetsova was the two-time defending champion, but withdrew before the tournament began.
Martina Hingis and Jamie Murray were the defending champions, but Hingis retired from professional tennis at the end of 2017. Murray successfully defended his title alongside Bethanie Mattek-Sands, defeating Alicja Rosolska and Nikola Mektić, 2–6, 6–3, [11–9] to win the Mixed Doubles tennis title at the 2018 US Open
Wang Qiang was the defending champion, but lost in the first round to Peng Shuai.
This was the first edition of the tournament, organised with a single-year license in 2021.