# 2023 Oeiras Ladies Open – Singles

Elisabetta Cocciaretto was the defending champion but chose not to participate.
Danka Kovinić won the title, defeating Rebeka Masarova in the final, 6–2, 6–2.

## Seeds

* Marie Bouzková (quarterfinals)
* Linda Nosková (first round, retired)
* Mayar Sherif (semifinals)
* Anna Blinkova (second round)
* Danka Kovinić (champion)
* Nuria Párrizas Díaz (second round)
* Sara Errani (second round)
* Anna Bondár (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 |
| 5 | Danka Kovinić | 0 | 6 | 6 | | | | |
| | Sara Sorribes Tormo | 6 | 3 | 2 | | | | |
| | Sara Sorribes Tormo | 6 | 3 | 2 | 5 | Danka Kovinić | 6 | 6 |
| | | | | | | Rebeka Masarova | 2 | 2 |
| 3 | Mayar Sherif | 4 | 5 | | | Rebeka Masarova | 2 | 2 |
| | Rebeka Masarova | 6 | 7 | | | | | |

### Top half

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | M Bouzková | 6 | 6 | | | | | | | | | | | | | |
| | F Jorge | 3 | 2 | 1 | M Bouzková | 6 | 6 | | | | | | | | | |
| Q | I Kruger | 6 | 6 | Q | I Kruger | 0 | 3 | | | | | | | | | |
| Q | F Curmi | 1 | 1 | | | | | 1 | M Bouzková | 3 | 4 | | | | | |
| | D Parry | 2 | 4 | | | | | 5 | D Kovinić | 6 | 6 | | | | | |
| WC | E Bouchard | 6 | 6 | WC | E Bouchard | 3 | 5 | | | | | | | | | |
| | O Dodin | 5 | 2 | 5 | D Kovinić | 6 | 7 | | | | | | | | | |
| 5 | D Kovinić | 7 | 6 | | | | | | | | | 5 | D Kovinić | 0 | 6 | 6 |
| 4 | A Blinkova | 6 | 6 | | | | | | | | | | S Sorribes Tormo | 6 | 3 | 2 |
| SR | A Hesse | 2 | 2 | 4 | A Blinkova | 2 | 6$^2$ | | | | | | | | | |
| | F Contreras | 2 | 2 | | E Andreeva | 6 | 7$^7$ | | | | | | | | | |
| | E Andreeva | 6 | 6 | | | | | | E Andreeva | 1 | 3 | | | | | |
| Q | L Meyer auf der Heide | 0 | 0 | | | | | | S Sorribes Tormo | 6 | 6 | | | | | |
| | S Sorribes Tormo | 6 | 6 | | S Sorribes Tormo | 6 | 6 | | | | | | | | | |
| WC | M Jorge | 2 | 2 | 6/Q | N Párrizas Díaz | 1 | 4 | | | | | | | | | |
| 6/Q | N Párrizas Díaz | 6 | 6 | | | | | | | | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | A Bondár | 6 | 6$^5$ | 4 | | | | | | | | | | | | | | |
| | M Uchijima | 1 | 7$^7$ | 6 | | M Uchijima | 7$^7$ | 4 | 6 | | | | | | | | | |
| Q | N Berberović | 6 | 7 | | Q | N Berberović | 6$^4$ | 6 | 2 | | | | | | | | | |
| Q | J Mikulskytė | 3 | 5 | | | | | | | | M Uchijima | 1 | 7$^9$ | 2 | | | | |
| Q | J Malečková | 6 | 5 | 7 | | | | | | 3 | M Sherif | 6 | 6$^7$ | 6 | | | | |
| | K Mladenovic | 4 | 7 | 5 | Q | J Malečková | 2 | 2 | | | | | | | | | | |
| | A Muhammad | 4 | 1 | | 3 | M Sherif | 6 | 6 | | | | | | | | | | |
| 3 | M Sherif | 6 | 6 | | | | | | | | | | | | 3 | M Sherif | 4 | 5 |
| 7 | S Errani | 6 | 7 | | | | | | | | | | | | | R Masarova | 6 | 7 |
| | O Gadecki | 3 | 5 | | 7 | S Errani | 6$^5$ | 4 | | | | | | | | | | |
| | R Masarova | 6 | 3 | 6 | | R Masarova | 7$^7$ | 6 | | | | | | | | | | |
| LL | L Cortez Llorca | 0 | 6 | 2 | | | | | | | R Masarova | 6 | 6 | | | | | |
| | C Tauson | 2 | 7$^7$ | 6 | | | | | | | C Tauson | 2 | 1 | | | | | |
| WC | E Svitolina | 6 | 6$^3$ | 4 | | C Tauson | 7$^7$ | 5 | 7 | | | | | | | | | |
| Q | M Rouvroy | 6 | 2 | | Q | M Rouvroy | 6$^5$ | 7 | 5 | | | | | | | | | |
| 2 | L Nosková | 2 | 0$^r$ | | | | | | | | | | | | | | | |