# 2023 Koper Open – Singles

Kathinka von Deichmann was the defending champion but chose not to participate.
Aliona Bolsova won the title after Irina Bara retired in the final at 3–6, 6–2, 4–1.

## Seeds

All seeds receive a bye into the second round.
* Jasmine Paolini (third round)
* Léolia Jeanjean (second round)
* Réka Luca Jani (quarterfinals)
* Olga Danilović (third round)
* Polina Kudermetova (second round)
* Tara Würth (second round)
* Aliona Bolsova (champion)
* Nuria Brancaccio (third round)
* Jaimee Fourlis (second round)
* Jaqueline Cristian (semifinals)
* Jéssica Bouzas Maneiro (quarterfinals)
* Antonia Ružić (third round)
* Lina Gjorcheska (second round)
* Alexandra Cadanțu-Ignatik (second round)
* Kristina Dmitruk (quarterfinals)
* Tena Lukas (third 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

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 15 | Kristina Dmitruk | 2 | 4 | | | | | | | | | | |
| 10 | Jaqueline Cristian | 6 | 6 | | | | | | | | | | |
| 10 | Jaqueline Cristian | 6 | 6 | 10 | Jaqueline Cristian | 2 | 1 | | | | | | |
| | | | | 7 | Aliona Bolsova | 6 | 6 | | | | | | |
| 3 | Réka Luca Jani | 0 | 2 | 7 | Aliona Bolsova | 6 | 6 | | | | | | |
| 7 | Aliona Bolsova | 6 | 6 | | | | | | | | | | |
| 7 | Aliona Bolsova | 6 | 6 | | | | | | 7 | Aliona Bolsova | 3 | 6 | 4 |
| | | | | | | | | | | Irina Bara | 6 | 2 | 1$^r$ |
| | Irina Bara | 6 | 6 | | | | | | | | | | | Irina Bara | 6 | 2 | 1$^r$ |
| LL | Silvia Ambrosio | 2 | 0 | | | | | | | | | | |
| LL | Silvia Ambrosio | 2 | 0 | | Irina Bara | 3 | 7 | 6 | | | | | |
| | | | | Q | Andreea Mitu | 6 | 5 | 4 | | | | | |
| 11 | Jéssica Bouzas Maneiro | 4 | 1 | Q | Andreea Mitu | 6 | 5 | 4 | | | | | |
| Q | Andreea Mitu | 6 | 6 | | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1 | J Paolini | 6 | 6 | | | | | | | | | |
| WC | N Jurič | 4 | 1 | | Q | D Hindová | 1 | 0 | | | | | | | | | |
| Q | D Hindová | 6 | 6 | | | | | | | 1 | J Paolini | 0 | 2 | | | | |
| Q | I Šebestová | 1 | 0 | | | | | | | 15 | K Dmitruk | 6 | 6 | | | | |
| | W Falkowska | 6 | 6 | | | W Falkowska | 7 | 1 | 5 | | | | | | | | |
| | | | | | 15 | K Dmitruk | 5 | 6 | 7 | | | | | | | | |
| | | | | | | | | | | | | | | 15 | K Dmitruk | 2 | 4 |
| | | | | | | | | | | | | | | 10 | J Cristian | 6 | 6 |
| | | | | | 10 | J Cristian | 6$^3$ | 4 | | | | | | | | | |
| | L Bošković | 6 | 6 | | | L Bošković | 7$^7$ | 0$^r$ | | | | | | | | | |
| Q | E Méri | 3 | 4 | | | | | | | 10 | J Cristian | 7$^7$ | 6 | | | | |
| | J Kolodynska | 4 | 7$^8$ | 4 | | | | | | | V Erjavec | 6$^4$ | 4 | | | | |
| | V Erjavec | 6 | 6$^6$ | 6 | | V Erjavec | 7$^7$ | 6 | | | | | | | | | |
| | | | | | 6 | T Würth | 6$^2$ | 2 | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 3 | RL Jani | 6 | 6 | | | | | | | | | | |
| Q | Y Morderger | 4 | 4 | | | B Cengiz | 3 | 3 | | | | | | | | | | |
| | B Cengiz | 6 | 6 | | | | | | | 3 | RL Jani | 2 | 6 | 6 | | | | |
| Q | A Nagy | 1 | 2 | | | | | | | 16 | T Lukas | 6 | 1 | 4 | | | | |
| WC | A Anshba | 6 | 6 | | WC | A Anshba | 4 | 3 | | | | | | | | | | |
| | | | | | 16 | T Lukas | 6 | 6 | | | | | | | | | | |
| | | | | | | | | | | | | | | | 3 | RL Jani | 0 | 2 |
| | | | | | | | | | | | | | | | 7 | A Bolsova | 6 | 6 |
| | | | | | 12 | A Ružić | 6 | 6 | | | | | | | | | | |
| | İ Öz | 6 | 3 | 6 | | İ Öz | 2 | 2 | | | | | | | | | | |
| WC | P Lovrič | 3 | 6 | 3 | | | | | | 12 | A Ružić | 6 | 1 | 0 | | | | |
| | N Szabanin | 5 | 6 | 2$^r$ | | | | | | 7 | A Bolsova | 3 | 6 | 6 | | | | |
| | A Kulikova | 7 | 3 | 4 | | A Kulikova | 4 | 6 | 1 | | | | | | | | | |
| | | | | | 7 | A Bolsova | 6 | 4 | 6 | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 5 | P Kudermetova | 4 | 4 | | | | | | | | | |
| | L Radivojević | 4 | 7 | 2 | | I Bara | 6 | 6 | | | | | | | | | |
| | I Bara | 6 | 5 | 6 | | | | | | I Bara | 7$^9$ | 5 | 7$^7$ | | | | |
| | J Fett | 6 | 1 | | | | | | | J Fett | 6$^7$ | 7 | 6$^5$ | | | | |
| | N Potočnik | 4 | 0$^r$ | | | J Fett | 6 | 6 | | | | | | | | | |
| | | | | | 9 | J Fourlis | 3 | 3 | | | | | | | | | |
| | | | | | | | | | | | | | | | I Bara | 6 | 6 |
| | | | | | | | | | | | | | | LL | S Ambrosio | 2 | 0 |
| | | | | | 14 | A Cadanțu-Ignatik | 1 | 3 | | | | | | | | | |
| | A Kučmová | 3 | 7 | 4 | LL | S Ambrosio | 6 | 6 | | | | | | | | | |
| LL | S Ambrosio | 6 | 5 | 6 | | | | | LL | S Ambrosio | 6 | 6 | | | | | |
| Q | C Ferrando | 7 | 0 | 2 | | | | | 4/SR | O Danilović | 2 | 1 | | | | | |
| WC | EN Milić | 5 | 6 | 6 | WC | EN Milić | 2 | 3 | | | | | | | | | |
| | | | | | 4/SR | O Danilović | 6 | 6 | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 8 | N Brancaccio | 6 | 6 | | | | | | | | | |
| | D Cherubini | 4 | 4 | | | S Lamens | 4 | 1 | | | | | | | | | |
| | S Lamens | 6 | 6 | | | | | | | 8 | N Brancaccio | 6$^2$ | 3 | | | | |
| | A Turati | 1 | 3 | | | | | | | 11 | J Bouzas Maneiro | 7$^7$ | 6 | | | | |
| Q | A Soboleva | 6 | 6 | | Q | A Soboleva | 3 | 5 | | | | | | | | | |
| | | | | | 11 | J Bouzas Maneiro | 6 | 7 | | | | | | | | | |
| | | | | | | | | | | | | | | 11 | J Bouzas Maneiro | 4 | 1 |
| | | | | | | | | | | | | | | Q | A Mitu | 6 | 6 |
| | | | | | 13 | L Gjorcheska | 1 | 7 | 4 | | | | | | | | |
| Q | A Mitu | 6 | 7 | | Q | A Mitu | 6 | 5 | 6 | | | | | | | | |
| | P Plipuech | 3 | 5 | | | | | | | Q | A Mitu | 6 | 6 | | | | |
| SR | K McPhee | 5 | 6 | 3 | | | | | | WC | Ž Falkner | 1 | 1 | | | | |
| WC | Ž Falkner | 7 | 4 | 6 | WC | Ž Falkner | 7 | 6 | | | | | | | | | |
| | | | | | 2 | L Jeanjean | 5 | 3 | | | | | | | | | |