| Doubles | |
|---|---|
| 2024 Oeiras Indoors II | |
| Champions |  Karol Drzewiecki Piotr Matuszewski |
| Runners-up |  Arjun Kadhe  Marcus Willis |
| Score | 6–3, 6–4 |
Jay Clarke and Marcus Willis were the defending champions [1] but only Willis chose to defend his title, partnering Arjun Kadhe. Willis lost in the final to Karol Drzewiecki and Piotr Matuszewski.
Drzewiecki and Matuszewski won the title after defeating Kadhe and Willis 6–3, 6–4 in the final.
Jonathan Eysseric / 
Luis David Martínez (quarterfinals)
Roman Jebavý / 
Philipp Oswald (quarterfinals)
Sander Arends / Sem Verbeek (quarterfinals) Arjun Kadhe / Marcus Willis (final)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | J Eysseric LD Martínez | 710 | 6 | ||||||||||||||||||||||||
 M Copil A Jecan | 68 | 2 | 1 | J Eysseric LD Martínez | 64 | 77 | [5] | ||||||||||||||||||||
 M Lībietis  P Niklas-Salminen | 7 | 6 | M Lībietis P Niklas-Salminen | 77 | 63 | [10] | |||||||||||||||||||||
T Arribagé  M Geerts | 5 | 3 | M Lībietis P Niklas-Salminen | 5 | 5 | ||||||||||||||||||||||
| 3 | S Arends S Verbeek | 6 | 6 | K Drzewiecki P Matuszewski | 7 | 7 | |||||||||||||||||||||
 Volodymyr Uzhylovskyi Samuel Vincent Ruggeri | 2 | 2 | 3 | S Arends S Verbeek | 2 | 6 | [8] | ||||||||||||||||||||
D Added  M Damm | 3 | 61 | K Drzewiecki P Matuszewski | 6 | 3 | [10] | |||||||||||||||||||||
| K Drzewiecki P Matuszewski | 6 | 77 | K Drzewiecki P Matuszewski | 6 | 6 | ||||||||||||||||||||||
A Lawson  S Martos Gornés | 5 | 4 | 4 | A Kadhe M Willis | 3 | 4 | |||||||||||||||||||||
| Alt |  Gonçalo Falcão F Romboli | 7 | 6 | Alt | G Falcão F Romboli | ||||||||||||||||||||||
| WC | Tiago Pereira Francisco Rocha | 1 | 4 | 4 | A Kadhe M Willis | w/o | |||||||||||||||||||||
| 4 | A Kadhe M Willis | 6 | 6 | 4 | A Kadhe M Willis | 6 | 3 | [13] | |||||||||||||||||||
| Alt |  A Andreev A McHugh | 3 | 4 |  F Bergevi M Veldheer | 2 | 6 | [11] | ||||||||||||||||||||
| F Bergevi M Veldheer | 6 | 6 | F Bergevi M Veldheer | 6 | 7 | ||||||||||||||||||||||
| J Faria H Rocha | 6 | 1 | [8] | 2 | R Jebavý P Oswald | 3 | 5 | ||||||||||||||||||||
| 2 | R Jebavý P Oswald | 4 | 6 | [10] | |||||||||||||||||||||||
Alexander Erler and Lucas Miedler were the defending champions but chose not to compete.
Marco Bortolotti and Arjun Kadhe were the defending champions but lost in the first round to Kaichi Uchida and Wu Tung-lin.
Saketh Myneni and Ramkumar Ramanathan were the defending champions but lost in the final to Alexander Erler and Arjun Kadhe.
Igor Sijsling and Tim van Rijthoven were the defending champions but chose not to defend their title.
Robert Galloway and Alex Lawson were the defending champions but chose not to defend their title.
This was the first edition of the tournament.
Radu Albot and Alexander Cozbinov were the defending champions but chose not to defend their title.
Guillermo Durán and Nicolás Mejía were the defending champions but chose not to defend their title.
Purav Raja and Ramkumar Ramanathan were the defending champions but only Ramanathan chose to defend his title, partnering Arjun Kadhe. Ramanathan lost in the quarterfinals to Marc Polmans and Jason Taylor.
This was the first edition of the tournament.
Gianluca Mager and Andrea Pellegrino were the defending champions but chose not to defend their title.
Dustin Brown and Andrea Vavassori were the defending champions but chose not to defend their title.
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.
Hsu Yu-hsiou and Yuta Shimizu were the defending champions but lost in the quarterfinals to Rithvik Choudary Bollipalli and Arjun Kadhe.
Sander Arends and David Pel were the defending champions but chose not to defend their title.
The 2024 Oeiras Indoors II was a professional tennis tournament played on hard courts. It was the 4th edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Oeiras, Portugal from 8 to 13 January 2024.
Andrew Harris and Christian Harrison were the defending champions but chose not to defend their title.
Jay Clarke and Arjun Kadhe were the defending champions but only Kadhe chose to defend his title, partnering Hsu Yu-hsiou. Kadhe lost in the quarterfinals to Toshihide Matsui and Kaito Uesugi.
Anirudh Chandrasekar and Vijay Sundar Prashanth were the defending champions but chose not to defend their title.
Yuki Bhambri and Mahesh Bhupathi were the defending champions from when the tournament was last held in 2016, but they didn't defend their title as Bhambri chose not to participate and Bhupathi retired from professional tennis.
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