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| 2025 Oeiras Indoors II | |
|---|---|
| Date | 13 – 19 January |
| Edition | 6th |
| Category | ATP Challenger Tour 100 |
| Surface | Hard (indoor) |
| Location | Oeiras, Portugal |
| Champions | |
| Singles | |
 Aleksandar Kovacevic | |
| Doubles | |
 Mili Poljičak /  Matej Sabanov | |
The 2025 Oeiras Indoors II was a professional tennis tournament played on hard courts. It was the 6th edition of the tournament which was part of the 2025 ATP Challenger Tour. It took place in Oeiras, Portugal from 13 to 19 January 2025.