| 2025 Oeiras Indoors | |
|---|---|
| Date | 6 – 11 January |
| Edition | 5th |
| Category | ATP Challenger Tour 75 |
| Surface | Hard (indoor) |
| Location | Oeiras, Portugal |
| Champions | |
| Singles | |
 Hamad Medjedovic | |
| Doubles | |
 George Goldhoff / Trey Hilderbrand | |
The 2025 Oeiras Indoors was a professional tennis tournament played on hard courts. It was the 5th edition of the tournament which was part of the 2025 ATP Challenger Tour. It took place in Oeiras, Portugal from 6 to 11 January 2025.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| SRB | Hamad Medjedovic | 114 | 1 |
 SUI | Alexander Ritschard | 118 | 2 |
 KAZ | Beibit Zhukayev | 243 | 3 |
| KAZ | Denis Yevseyev | 246 | 4 |
 CAN | Liam Draxl | 247 | 5 |
 CHI | Matías Soto | 248 | 6 |
 HUN | Zsombor Piros | 249 | 7 |
 ESP | Pol Martín Tiffon | 251 | 8 |
The following players received wildcards into the singles main draw:
Pedro Araújo Frederico Ferreira Silva Duarte Vale The following players received entry from the qualifying draw:
Hamad Medjedovic def. Liam Draxl 6–1, 6–3. George Goldhoff / Trey Hilderbrand def. 
Kaichi Uchida / Denis Yevseyev 7–5, 2–6, [10–5].The 2021 Open de Oeiras was a professional tennis tournament played on clay courts. It was the first edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Oeiras, Portugal between 29 March and 3 April 2021.
The 2021 Open de Oeiras II was a professional tennis tournament played on clay courts. It was the second edition of the tournament, part of the 2021 ATP Challenger Tour. It took place in Oeiras, Portugal between 5 and 11 April 2021.
The 2021 Open de Oeiras III was a professional tennis tournament played on clay courts. It was the third edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Oeiras, Portugal between 17 and 23 May 2021.
The 2021 Open de Oeiras IV was a professional tennis tournament played on clay courts. It was the fourth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Oeiras, Portugal between 24 and 30 May 2021.
The 2022 Open de Oeiras was a professional tennis tournament played on clay courts. It was the fifth edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Oeiras, Portugal between 28 March and 4 April 2022.
The 2022 Open de Oeiras II was a professional tennis tournament played on clay courts. It was the sixth edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Oeiras, Portugal between 4 and 10 April 2022.
The 2022 Open de Oeiras III was a professional tennis tournament played on clay courts. It was the seventh edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Oeiras, Portugal between 20 and 26 June 2022.
The 2023 Oeiras Indoors was a professional tennis tournament played on hard courts. It was the 1st edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Oeiras, Portugal from 2 to 8 January 2023.
The 2023 Oeiras Indoors II was a professional tennis tournament played on hard courts. It was the 2nd edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Oeiras, Portugal from 9 to 14 January 2023.
The 2023 Open de Oeiras II was a professional tennis tournament played on clay courts. It was the ninth edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Oeiras, Portugal between 15 and 20 May 2023.
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.
The 2024 Yucatán Open was a professional tennis tournament played on clay courts. It was the first edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Mérida, Mexico, between 18 and 23 March 2024.
The 2024 Open de Oeiras was a professional tennis tournament played on clay courts. It was the tenth edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Oeiras, Portugal between 15 and 21 April 2024.
The 2024 Santos Brasil Tennis Cup was a professional tennis tournament played on clay courts. It was the first edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Santos, Brazil between 6 and 12 May 2024.
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.
The 2024 Challenger Santa Fe was a professional tennis tournament played on clay courts. It was the third edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Santa Fe, Argentina between 3 and 9 June 2024.
The 2024 Lima Challenger was a professional tennis tournament played on clay courts. It was the 21st edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Lima, Peru between 10 and 16 June 2024.
The 2024 Santa Cruz Challenger II was a professional tennis tournament played on clay courts. It was the fifth edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Santa Cruz de la Sierra, Bolivia between 17 and 22 June 2024.
The 2024 Las Vegas Challenger was a professional tennis tournament played on hard courts. It was the eighth edition of the revamped tournament which was the part of the 2024 ATP Challenger Tour. It took place in Las Vegas, United States between September 9 and September 15, 2024.
The 2024 Fairfield Challenger was a professional tennis tournament played on hard courts. It was the eighth edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Fairfield, California, United States between October 6 and October 13, 2024.
