| Doubles | |
|---|---|
| 2024 Open de Oeiras II | |
| Champions |  Anirudh Chandrasekar Arjun Kadhe |
| Runners-up |  Simon Freund  Johannes Ingildsen |
| Score | 7–5, 6–4 |
Filip Bergevi and Mick Veldheer were the defending champions [1] but lost in the semifinals to Simon Freund and Johannes Ingildsen.
Anirudh Chandrasekar and Arjun Kadhe won the title after defeating Freund and Ingildsen 7–5, 6–4 in the final.
Anirudh Chandrasekar / Arjun Kadhe (champions)
Christian Harrison / 
Fabrice Martin (quarterfinals) Filip Bergevi / 
Mick Veldheer (semifinals) Dan Added / George Goldhoff (first round, retired)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | A Chandrasekar A Kadhe | 77 | 6 | ||||||||||||||||||||||||
 G Heide Gabriel Roveri Sidney | 65 | 3 | 1 | A Chandrasekar A Kadhe | 6 | 6 | |||||||||||||||||||||
 D Popko B Zhukayev | 6 | 2 | [11] | D Popko B Zhukayev | 3 | 3 | |||||||||||||||||||||
| WC |  Tiago Pereira D Vale | 3 | 6 | [9] | 1 | A Chandrasekar A Kadhe | 6 | 78 | |||||||||||||||||||
| 4 | D Added G Goldhoff | 66 | 1r | WC | P Araújo J Domingues | 4 | 66 | ||||||||||||||||||||
| WC | Pedro Araújo J Domingues | 78 | 3 | WC | P Araújo J Domingues | 2 | 6 | [10] | |||||||||||||||||||
 J Schnaitter M Wallner | 65 | 65 |  F Duda V Kopřiva | 6 | 4 | [7] | |||||||||||||||||||||
| Filip Duda V Kopřiva | 77 | 77 | 1 | A Chandrasekar A Kadhe | 7 | 6 | |||||||||||||||||||||
 I Liutarevich  D Vega Hernández | 2 | 3 | S Freund J Ingildsen | 5 | 4 | ||||||||||||||||||||||
 A Jecan  M Kalovelonis | 6 | 6 | A Jecan M Kalovelonis | 3 | 4 | ||||||||||||||||||||||
| Alt | J Forejtek D Svrčina | 7 | 3 | [1] | 3 | F Bergevi M Veldheer | 6 | 6 | |||||||||||||||||||
| 3 | F Bergevi M Veldheer | 5 | 6 | [10] | 3 | F Bergevi M Veldheer | 62 | 6 | [8] | ||||||||||||||||||
| Mac Kiger A Lawson | 2 | 6 | [6] | S Freund J Ingildsen | 77 | 4 | [10] | ||||||||||||||||||||
| S Freund J Ingildsen | 6 | 3 | [10] | S Freund J Ingildsen | 5 | 6 | [10] | ||||||||||||||||||||
 K Drzewiecki S Walków | 2 | 1 | 2 | C Harrison F Martin | 7 | 1 | [5] | ||||||||||||||||||||
| 2 | C Harrison F Martin | 6 | 6 | ||||||||||||||||||||||||
Saketh Myneni and Ramkumar Ramanathan were the defending champions but lost in the final to Alexander Erler and Arjun Kadhe.
Albano Olivetti and David Vega Hernández were the defending champions but only Olivetti chose to defend his title, partnering Hunter Reese. Olivetti lost in the quarterfinals to Anirudh Chandrasekar and Arjun Kadhe.
Gianluca Mager and Andrea Pellegrino were the defending champions but chose not to defend their title.
Alexander Erler and Arjun Kadhe were the defending champions but only Kadhe chose to defend his title, partnering Maximilian Neuchrist. Kadhe and Neuchrist lost in the semifinals to Anirudh Chandrasekar and Vijay Sundar Prashanth.
Purav Raja and Ramkumar Ramanathan were the defending champions but only Raja chose to defend his title, partnering Petr Nouza. Raja lost in the quarterfinals to Anirudh Chandrasekar and Vijay Sundar Prashanth.
Victor Vlad Cornea and Andrew Paulson were the defending champions but only Paulson chose to defend his title, partnering Petr Nouza. Paulson successfully defended his title after defeating Filip Bergevi and Mick Veldheer 7–5, 6–3 in the final.
Alexander Erler and Lucas Miedler were the defending champions but chose not to defend their title.
This was the first edition of the tournament.
Denis Istomin and Evgeny Karlovskiy were the defending champions but withdrew from their quarterfinals match against Daniel Cukierman and Joshua Paris.
Victor Vlad Cornea and Ruben Gonzales were the defending champions but only Gonzales chose to defend his title, partnering Chung Yun-seong. Gonzales lost in the semifinals to Ray Ho and Calum Puttergill.
Sadio Doumbia and Fabien Reboul were the defending champions but withdrew before their first round match.
This was the first edition of the tournament.
Anirudh Chandrasekar and Vijay Sundar Prashanth were the defending champions but chose not to defend their title.
Daniel Rincón and Abdullah Shelbayh were the defending champions but chose not to defend their title.
Harri Heliövaara and Roman Jebavý were the defending champions but chose not to defend their title.
Skander Mansouri and Michail Pervolarakis were the defending champions but only Mansouri chose to defend his title, partnering Luke Johnson. He lost in the semifinals to Arjun Kadhe and Jeevan Nedunchezhiyan.
Sadio Doumbia and Fabien Reboul were the defending champions but chose not to defend their title.
Luke Johnson and Sem Verbeek were the defending champions but only Verbeek chose to defend his title, partnering André Göransson. He lost in the quarterfinals to Manuel Guinard and Grégoire Jacq.
William Blumberg and Luis David Martínez were the defending champions but only Martínez chose to defend his title, partnering Federico Agustín Gómez. He lost in the semifinals to Christian Harrison and Marcus Willis.
The 2024 Open de Oeiras II was a professional tennis tournament played on clay courts. It was the 11th edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Oeiras, Portugal between 13 and 18 May 2024.