2025 Open de Oeiras II
Tennis tournament
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The 2025 Open de Oeiras II was a professional tennis tournament played on clay courts. It was the 13th edition of the tournament which was part of the 2025 ATP Challenger Tour. It took place in Oeiras, Portugal between 12 and 17 May 2025.
| 2025 Open de Oeiras II | |
|---|---|
| Date | 12–17 May |
| Edition | 13th |
| Surface | Clay |
| Location | Oeiras, Portugal |
| Champions | |
| Singles | |
 Cristian Garín | |
| Doubles | |
 Andreas Mies /  David Vega Hernández | |
Singles main-draw entrants
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 BRA |
Thiago Monteiro | 106 | 1 |
 POR |
|||
 USA |
Christopher Eubanks | 110 | 3 |
 DEN |
|||
| USA |
Tristan Boyer | 122 | 5 |
| BRA |
Felipe Meligeni Alves | 123 | 6 |
 ARG |
Thiago Agustín Tirante | 133 | 7 |
| ARG |
Román Andrés Burruchaga | 135 | 8 |
- 1 Rankings are as of 5 May 2025.[1]
Other entrants
The following players received wildcards into the singles main draw:
Pedro Araújo- Gastão Elias
- Tiago Pereira
The following player received entry into the singles main draw using a protected ranking:
The following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Champions
Singles
Cristian Garín def. 
Mitchell Krueger 7–6(7–3), 4–6, 6–2.
Doubles
Andreas Mies / 
David Vega Hernández def. 
Marcelo Demoliner / 
David Pichler 6–4, 6–4.
