| Doubles | |
|---|---|
| 2025 Oeiras Indoors | |
| 2024 Champions |  Karol Drzewiecki Piotr Matuszewski |
Karol Drzewiecki and Piotr Matuszewski were the defending champions [1] but chose not to defend their title.
| Doubles | |
|---|---|
| 2025 Oeiras Indoors | |
| 2024 Champions | Karol Drzewiecki Piotr Matuszewski |
Karol Drzewiecki and Piotr Matuszewski were the defending champions [1] but chose not to defend their title.
| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 |  LD Martínez  M Soto | ||||||||||||||||||||||||||
 I Liutarevich  L Sanchez | | ||||||||||||||||||||||||||
 G Goldhoff T Hilderbrand | | ||||||||||||||||||||||||||
 A Merino  C Negritu | |||||||||||||||||||||||||||
| 4 | R Cash JJ Tracy | ||||||||||||||||||||||||||
 D Molchanov V Sachko | | ||||||||||||||||||||||||||
 L Draxl B Sigouin | | ||||||||||||||||||||||||||
| WC |  Pedro Araújo Tiago Pereira | ||||||||||||||||||||||||||
 Í Cervantes D Rincón | |||||||||||||||||||||||||||
 A Jecan  Giorgio Ricca | | ||||||||||||||||||||||||||
| WC | G Elias D Vale | | |||||||||||||||||||||||||
| 3 | C Harper  D Stevenson | ||||||||||||||||||||||||||
I Gakhov  H Medjedovic | |||||||||||||||||||||||||||
| I Sabanov M Sabanov | | ||||||||||||||||||||||||||
 K Uchida  D Yevseyev | | ||||||||||||||||||||||||||
| 2 |  F Bergevi  J Ingildsen | ||||||||||||||||||||||||||
Roger Federer was the defending champion, but chose not to play that year. Albert Montañés won the title, notably by saving match points in quarterfinal and final match.
Martin Damm and David Prinosil were the defending champions but did not compete that year.
Jiří Novák and David Rikl were the defending champions but lost in the quarterfinals to Tomáš Cibulec and Leoš Friedl.
Jacco Eltingh and Paul Haarhuis were the defending champions and successfully defended their title after David Adams and Andrei Olhovskiy withdrew prior to the final.
John Isner was the defending champion but lost in the quarterfinals to David Nalbandian. David Ferrer won the title, defeating Nalbandian 6–3, 6–2 in the final.
Leander Paes and David Rikl were defending champions. Rikl was also the two-time defending champion, having won the title with Joshua Eagle in 2002.
Marc López and David Marrero were the defending champions. They reached the final, where they lost to Eric Butorac and Jean-Julien Rojer 3–6, 4–6.
Scott Davis and Tim Pawsat were the defending champions. Pawsat did not enter the event that year, while Davis participated alongside David Pate.
Davis eventually defended his title with Pate, defeating Alfonso Mora and Brian Page 6–3, 7–6(7–5), in the final.
James Blake was the defending champion and successfully defended his title, beating Jarkko Nieminen 6–4, 6–2 in the final.
Tomás Carbonell and Donald Johnson were the defending champions, but did not participate together this year. Carbonell partnered Juan Balcells, losing in the first round. Johnson partnered Piet Norval and successfully defended his title.
Donald Johnson and Francisco Montana were the defending champions, but did not participate together this year. Johnson partnered Tomás Carbonell, successfully defending his title. Montana partnered Chris Haggard, losing in the semifinals.
Bob Bryan and Mike Bryan were the defending champions and successfully defended their title, defeating Scott Lipsky and David Martin 7–6(7–5), 6–2, in the final.
Luis Lobo and Javier Sánchez were the defending champions, but Sánchez did not participate this year. Lobo partnered Daniel Orsanic, losing in the first round.
Paul Annacone and Doug Flach were the defending champions, but did not participate this year.
Ellis Ferreira and Patrick Galbraith were the defending champions, but Ferreira did not participate this year. Galbraith partnered Brett Steven, successfully defending his title.
David Marrero and Fernando Verdasco were the defending champions but Verdasco decided not to participate.
Marrero successfully defended the title alongside Łukasz Kubot, defeating Simone Bolelli and Fabio Fognini in the final, 7–5, 6–2.
Santiago González and Scott Lipsky were the defending champions and successfully defended their title by defeating Pablo Cuevas and David Marrero in the final, 6–3, 3–6, [10–8].
Juan Sebastián Cabal and Robert Farah were the defending champions and successfully defended their title, defeating Santiago González and David Marrero in the final, 6–1, 6–4.
Jaime Oncins and Daniel Orsanic were the defending champions, but lost in first round to Magnus Norman and Marat Safin.
Paul Haarhuis and Mark Koevermans were the defending champions, but Koevermans did not compete this year.