
| Category | ATP Challenger Tour 100000$ |
| Name | Oeiras Challenger 100 |
| Drawsize | 32 |
| Round number | 5 |
| On date | 01/19/26 00:00 |
| Registration date | 01/13/26 00:00 |
| End registration date | 01/17/26 18:00 |
| Phase | Registration closed. |

| Tourn Points | Provisional Entry List | Official Entry List | Round 32 | Round 16 | Quarter-finals | Semi-finals | Finals |








