| Singles | |
|---|---|
| 2015 Ethias Trophy | |
| 2014 Champion |  David Goffin |
David Goffin was the defending champion, but chose to compete in the China Open.
| Singles | |
|---|---|
| 2015 Ethias Trophy | |
| 2014 Champion | David Goffin |
David Goffin was the defending champion, but chose to compete in the China Open.
Steve Darcis (first round)
Jerzy Janowicz (withdrew due to left knee injury)
Benjamin Becker (final)
Marcel Granollers (first round)
Marsel İlhan (first round)
Malek Jaziri (first round) Ruben Bemelmans (first round)
Paul-Henri Mathieu (second round)| Semifinals | Final | ||||||||||||
 Illya Marchenko | 77 | 6 | |||||||||||
| Jan-Lennard Struff | 65 | 3 | |||||||||||
| Illya Marchenko | 6 | 68 | 6 | ||||||||||
| 3/SE | Benjamin Becker | 2 | 710 | 4 | |||||||||
| 3/SE | Benjamin Becker | 64 | 77 | 77 | |||||||||
| Kenny de Schepper | 77 | 64 | 65 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | S Darcis | 7 | 3 | 3 | |||||||||||||||||||||||
| Q | M Teixeira | 5 | 6 | 6 | Q | M Teixeira | 4 | 1 | |||||||||||||||||||
| I Marchenko | 6 | 6 | I Marchenko | 6 | 6 | ||||||||||||||||||||||
| WC | G Gigounon | 3 | 2 | I Marchenko | 7 | 6 | |||||||||||||||||||||
 E Ymer | 77 | 63 | 6 |  K Kravchuk | 5 | 3 | |||||||||||||||||||||
| WC | N Desein | 65 | 77 | 3 | E Ymer | 610 | 65 | ||||||||||||||||||||
| K Kravchuk | 6 | 6 | K Kravchuk | 712 | 77 | ||||||||||||||||||||||
| 5 | M İlhan | 4 | 4 | I Marchenko | 77 | 6 | |||||||||||||||||||||
| 4 | M Granollers | 5 | 3 | J-L Struff | 65 | 3 | |||||||||||||||||||||
| J-L Struff | 7 | 6 | J-L Struff | 77 | 6 | ||||||||||||||||||||||
| LL | A Karatsev | 5 | 4 |  M Bašić | 62 | 4 | |||||||||||||||||||||
| M Bašić | 7 | 6 | J-L Struff | 7 | 6 | ||||||||||||||||||||||
 A Golubev | 3 | 4 | SE |  D Novak | 5 | 1 | |||||||||||||||||||||
 L Lacko | 6 | 6 | L Lacko | 64 | 3 | ||||||||||||||||||||||
| SE | D Novak | 77 | 4 | 77 | SE | D Novak | 77 | 6 | |||||||||||||||||||
| 6 | M Jaziri | 64 | 6 | 63 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | P-H Mathieu | 6 | 7 | ||||||||||||||||||||||||
| Q | Y Mertens | 4 | 5 | 8 | P-H Mathieu | 2 | 6 | 3 | |||||||||||||||||||
| WC | Clement Geens | 6 | 66 | 1 |  A Arnaboldi | 6 | 1 | 6 | |||||||||||||||||||
| A Arnaboldi | 4 | 78 | 6 | A Arnaboldi | 2 | 4 | |||||||||||||||||||||
| Q | Maxime Tabatruong | 6 | 6 | 3/SE | B Becker | 6 | 6 | ||||||||||||||||||||
| WC | M Authom | 3 | 3 | Q | M Tabatruong | 3 | 2 | ||||||||||||||||||||
| LL | S Doumbia | 4 | 3 | 3/SE | B Becker | 6 | 6 | ||||||||||||||||||||
| 3/SE | B Becker | 6 | 6 | 3/SE | B Becker | 64 | 77 | 77 | |||||||||||||||||||
| 7 | R Bemelmans | 5 | 6 | 3 | K de Schepper | 77 | 64 | 65 | |||||||||||||||||||
| K de Schepper | 7 | 3 | 6 | K de Schepper | 78 | 6 | |||||||||||||||||||||
| L Vanni | 3 | 4 | N Gombos | 66 | 3 | ||||||||||||||||||||||
| N Gombos | 6 | 6 | K de Schepper | 2 | 6 | 6 | |||||||||||||||||||||
 J-P Smith | 63 | 4 | Q | K Khachanov | 6 | 3 | 1 | ||||||||||||||||||||
 J Ward | 77 | 6 | J Ward | 1 | 6 | 2 | |||||||||||||||||||||
 I Dodig | 64 | 6 | 64 | Q | K Khachanov | 6 | 4 | 6 | |||||||||||||||||||
| Q | K Khachanov | 77 | 3 | 77 | |||||||||||||||||||||||
Defending champion Gustavo Kuerten successfully defended his title, defeating Àlex Corretja in the final 6–7(3–7), 7–5, 6–2, 6–0 to win the men's singles tennis title at the 2001 French Open.
Carlos Moyá defeated Àlex Corretja in the final, 6–3, 7–5, 6–3 to win the men's singles tennis title at the 1998 French Open.
Stefan Edberg defeated the defending champion Boris Becker in the final, 6–2, 6–2, 3–6, 3–6, 6–4 to win the gentlemen's singles tennis title at the 1990 Wimbledon Championships.
Defending champion Patrick Rafter defeated Mark Philippoussis in the all-Australian final, 6–3, 3–6, 6–2, 6–0 to win the men's singles tennis title at the 1998 US Open.
Magnus Norman was the defending champion of the singles event at the Heineken Open tennis tournament, held in Auckland, New Zealand, but did not compete that year.
Dominik Hrbatý was the defending champion of the singles event at the Heineken Open tennis tournament, held in Auckland, New Zealand, but lost in the first round to Gilles Elseneer.
Greg Rusedski was the defending champion of the singles event of the Heineken Open tennis tournament, held in Auckland, New Zealand, but did not compete that year.
Richard Krajicek was the defending champion, but lost in the semifinals to Jan Siemerink.
Sania Mirza and Mahesh Bhupathi were the defending champions, but withdrew before their first round match against Carly Gullickson and Bernard Tomic. They were replaced in the draw by Akgul Amanmuradova and Rik de Voest.
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.
Juan Ignacio Chela was the defending champion but did not compete that year.
Paul-Henri Mathieu was the defending champion but lost in the semifinals to Taylor Dent.
Anastasia Myskina was the defending champion, but chose not to participate that year.
Elena Bovina and Nenad Zimonjić won the title at the 2004 Australian Open, defeating the defending champions Martina Navratilova and Leander Paes in the final 6–1, 7–6(7–3).
Agnieszka Radwańska was the defending champion, but lost 6–0, 6–3 in the semifinals to the eventual champion Serena Williams.
Anna-Lena Grönefeld and Jean-Julien Rojer were the defending champions, but lost in the second round to Chan Yung-jan and John Peers.
This was the tournament's first edition.
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.
Yanina Wickmayer was the defending champion, but lost in the first round to Viktorija Golubic.