| Doubles | |
|---|---|
| 2005 Grand Prix Hassan II | |
| Champions |  František Čermák Leoš Friedl |
| Runners-up |  Martín García  Luis Horna |
| Final score | 6–4, 6–3 |
Enzo Artoni and Fernando Vicente were the defending champions. Artoni partnered with Marcin Matkowski this year, losing in the quarterfinals. Vicente did not participate.
František Čermák and Leoš Friedl won in the final 6–4, 6–3, against Martín García and Luis Horna.
Paul Hanley / Todd Perry (semifinals) František Čermák / Leoš Friedl (champions) Jordan Kerr / Sebastián Prieto (first round)
Fabrice Santoro / 
Rainer Schüttler (semifinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | P Hanley T Perry | 6 | 6 | ||||||||||||||||||||||||
 C Rochus T Vanhoudt | 4 | 3 | 1 | P Hanley T Perry | 6 | 7 | |||||||||||||||||||||
| J Vaněk T Zíb | 3 | 2 | F Mayer  G Müller | 2 | 5 | ||||||||||||||||||||||
| F Mayer G Müller | 6 | 6 | 1 | P Hanley T Perry | 4 | 69 | |||||||||||||||||||||
| 3 | J Kerr S Prieto | 64 | 3 | M García L Horna | 6 | 711 | |||||||||||||||||||||
| M García L Horna | 77 | 6 | M García L Horna | 6 | 6 | ||||||||||||||||||||||
| WC | A Clément A Di Pasquale | 7 | 4 | 2 |  E Artoni  M Matkowski | 4 | 3 | ||||||||||||||||||||
| E Artoni M Matkowski | 5 | 6 | 6 | M García L Horna | 4 | 3 | |||||||||||||||||||||
A Fisher  T Phillips | 7 | 2 | 6 | 2 | F Čermák L Friedl | 6 | 6 | ||||||||||||||||||||
M Fyrstenberg  S Ventura | 5 | 6 | 3 | A Fisher T Phillips | 5 | 6 | 2 | ||||||||||||||||||||
| L Burgsmüller M Puerta | 1 | 3 | 4 | F Santoro R Schüttler | 7 | 3 | 6 | ||||||||||||||||||||
| 4 | F Santoro R Schüttler | 6 | 6 | 4 | F Santoro R Schüttler | 2 | 3 | ||||||||||||||||||||
| J Acasuso J Mónaco | 6 | 6 | 2 | F Čermák L Friedl | 6 | 6 | |||||||||||||||||||||
A López Morón  R Wassen | 2 | 4 | J Acasuso J Mónaco | 0 | 1 | ||||||||||||||||||||||
| WC |  M El Aarej M Tahiri | 1 | 1 | 2 | F Čermák L Friedl | 6 | 6 | ||||||||||||||||||||
| 2 | F Čermák L Friedl | 6 | 6 | ||||||||||||||||||||||||
Mariusz Fyrstenberg and Marcin Matkowski were the defending champions, but lost in the semifinals to František Čermák and Leoš Friedl.
František Čermák and Leoš Friedl were the defending champions, but lost in the quarterfinals to Gustavo Kuerten and André Sá.
Paul Hanley and Nathan Healey were the defending champions but only Healey competed that year with Jeff Coetzee.
Tomás Carbonell and Daniel Orsanic were the defending champions but did not compete that year.
Mahesh Bhupathi and Leander Paes were the defending champions but they competed with different partners that year, Bhupathi with Todd Woodbridge and Paes with David Rikl.
Gastón Etlis and Martín Rodríguez were the defending champions but lost in the first round to David Ferrer and Fernando Vicente.
František Čermák and Leoš Friedl were the defending champions but lost in the final 6–4, 6–7 (7–9), 6–3 against Mariusz Fyrstenberg and Marcin Matkowski.
Lucas Arnold and Luis Lobo were the defending champions but only Arnold competed that year with Mariano Hood.
In the finale of the 2006 Estoril Open's Men's Doubles, František Čermák and Leoš Friedl were defending champions from the previous year. Čermák did not participate. Lukáš Dlouhý and Pavel Vízner won in the final 6–3, 6–1, against Lucas Arnold and Leoš Friedl.
Juan Ignacio Chela and Gastón Gaudio were the defending champions. Chela participated with Tommy Robredo this year, finishing runner-up. Gaudio did not participate this year.
František Čermák and Leoš Friedl were the defending champions, but did not participate this year.
František Čermák and Leoš Friedl were the defending champions, but lost in the semifinals to eventual champions Jiří Novák and Andrei Pavel.
David Ferrer and Santiago Ventura were the defending champions, but Ferrer did not participate this year. Ventura partnered with Flávio Saretta, losing in the first round.
Julian Knowle and Nenad Zimonjić were the defending champions, but lost in the semifinals this year.
Jonas Björkman and Max Mirnyi were the defending champions.
František Čermák and Leoš Friedl were the defending champions, but Čermák did not participate this year. Friedl partnered Michael Kohlmann, losing in the first round.
František Čermák and Leoš Friedl were the defending champions.
Lucas Arnold and Mariano Hood were the defending champions, but lost in the semifinals this year.
Leoš Friedl and Andrei Pavel were the defending champions, but chose not to participate together. Friedl played alongside František Čermák, but lost in the first round to Juan Ignacio Chela and Luis Horna. Pavel teamed up with Rogier Wassen, but lost in the first round to Tomáš Cibulec and Łukasz Kubot.
Martin Damm and Cyril Suk were the defending champions, but lost in the semifinals to Lucas Arnold Ker and Martín García.