# 2025 Oeiras Indoors II – Singles

Hamad Medjedovic was the defending champion but lost in the quarterfinals to Zsombor Piros.
Aleksandar Kovacevic won the title after defeating Piros 6–4, 7–6$^{(7–4)}$ in the final.

## Seeds

* Aleksandar Kovacevic (champion)
* Hamad Medjedovic (quarterfinals)
* Alexander Ritschard (quarterfinals)
* Mackenzie McDonald (semifinals)
* Dan Evans (first round)
* Henrique Rocha (second round)
* Maximilian Marterer (first round)
* Clément Chidekh (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Aleksandar Kovacevic | 6 | 3 | 6 | | | | |
| | Alexis Galarneau | 3 | 6 | 2 | | | | |
| | Alexis Galarneau | 3 | 6 | 2 | 1 | Aleksandar Kovacevic | 6 | 7$^7$ |
| | | | | | | Zsombor Piros | 4 | 6$^4$ |
| 4 | Mackenzie McDonald | 1 | 3 | | | Zsombor Piros | 4 | 6$^4$ |
| | Zsombor Piros | 6 | 6 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | A Kovacevic | 6 | 6 | | | | | | | | | | | | | | | | |
| | L Draxl | 1 | 3 | | 1 | A Kovacevic | 6 | 6 | | | | | | | | | | | |
| | M Lajal | 4 | | | | M Lajal | 3 | 3 | | | | | | | | | | | |
| Q | O Ovcharenko | 0$^r$ | | | | | | | | 1 | A Kovacevic | 6 | 6 | | | | | | |
| | B Zhukayev | 6 | 6 | | | | | | | | B Zhukayev | 4 | 3 | | | | | | |
| | M Soto | 1 | 4 | | | B Zhukayev | 7 | 4 | 6 | | | | | | | | | | |
| Q | E Butvilas | 6 | 5 | 6 | Q | E Butvilas | 5 | 6 | 1 | | | | | | | | | | |
| 7 | M Marterer | 4 | 7 | 1 | | | | | | | | | | | 1 | A Kovacevic | 6 | 3 | 6 |
| 3 | A Ritschard | 7$^7$ | 7 | | | | | | | | | | | | | A Galarneau | 3 | 6 | 2 |
| | P Kypson | 6$^5$ | 5 | | 3 | A Ritschard | 6 | 7 | | | | | | | | | | | |
| | G Mager | 6 | 4 | 4 | WC | P Araújo | 2 | 5 | | | | | | | | | | | |
| WC | Pedro Araújo | 3 | 6 | 6 | | | | | | 3 | A Ritschard | 6 | 5 | 6$^9$ | | | | | |
| | I Buse | 3 | 4 | | | | | | | | A Galarneau | 2 | 7 | 7$^{11}$ | | | | | |
| | A Galarneau | 6 | 6 | | | A Galarneau | 6 | 6 | | | | | | | | | | | |
| WC | G Elias | 6 | 5 | 7 | WC | G Elias | 3 | 4 | | | | | | | | | | | |
| 5 | D Evans | 4 | 7 | 5 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | H Rocha | 1 | 6 | 6 | | | | | | | | | | | | | |
| Q | R Bertrand | 6 | 2 | 2 | 6 | H Rocha | 7$^7$ | 6$^3$ | 6$^5$ | | | | | | | | |
| WC | F Ferreira Silva | 6 | 2 | 6 | WC | F Ferreira Silva | 6$^3$ | 7$^7$ | 7$^7$ | | | | | | | | |
| | D Yevseyev | 4 | 6 | 1 | | | | | | WC | F Ferreira Silva | 5 | 4 | | | | |
| | N Mejía | 3 | 1 | | | | | | | 4 | M McDonald | 7 | 6 | | | | |
| Q | JJ Wolf | 6 | 6 | | Q | JJ Wolf | 6$^5$ | 6 | 2 | | | | | | | | |
| | D Prižmić | 4 | 5 | | 4 | M McDonald | 7$^7$ | 4 | 6 | | | | | | | | |
| 4 | M McDonald | 6 | 7 | | | | | | | | | | | 4 | M McDonald | 1 | 3 |
| 8 | C Chidekh | 2 | 3 | | | | | | | | | | | | Z Piros | 6 | 6 |
| | Z Piros | 6 | 6 | | | Z Piros | 5 | | | | | | | | | | |
| | Pol Martín Tiffon | 7$^8$ | 6 | | | P Martín Tiffon | 2$^r$ | | | | | | | | | | |
| | J Barranco Cosano | 6$^6$ | 2 | | | | | | | | Z Piros | 6 | 7$^7$ | | | | |
| Q | Tiago Pereira | 6$^1$ | 3 | | | | | | | 2 | H Medjedovic | 4 | 6$^2$ | | | | |
| Q | E Kırkın | 7$^7$ | 6 | | Q | E Kırkın | 2 | 2 | | | | | | | | | |
| | A Shelbayh | 2 | 3 | | 2 | H Medjedovic | 6 | 6 | | | | | | | | | |
| 2 | H Medjedovic | 6 | 6 | | | | | | | | | | | | | | |