| Date: | 17–23 April 2023 |
| Edition: | 2nd |
| Surface: | Clay / Outdoor |
| Location: | Koper, Slovenia |
| Category: | ITF Women's World Tennis Tour |
| Prize Money: | $60,000 |
| Champs: |  Aliona Bolsova |
| Champd: |  Irina Bara / Andreea Mitu |
The 2023 Koper Open was a professional tennis tournament played on outdoor clay courts. It was the second edition of the tournament, which was part of the 2023 ITF Women's World Tennis Tour. It took place in Koper, Slovenia, between 17 and 23 April 2023.[1]
See main article: 2023 Koper Open – Singles.
Aliona Bolsova def. Irina Bara, 3–6, 6–2, 4–1, ret.See main article: 2023 Koper Open – Doubles.
Irina Bara / Andreea Mitu def. Suzan Lamens / 
Kaylah McPhee, 6–2, 6–3| Country | Player | Rank | Seed | |
|---|---|---|---|---|
 Italy | Jasmine Paolini | 66 | 1 | |
 France | Léolia Jeanjean | 116 | 2 | |
 Hungary | Réka Luca Jani | 129 | 3 | |
 Serbia | Olga Danilović | 135 | 4 | |
| Polina Kudermetova | 141 | 5 | ||
| Tara Würth | 146 | 6 | ||
| Spain | Aliona Bolsova | 148 | 7 | |
| Italy | Nuria Brancaccio | 170 | 8 | |
| Australia | Jaimee Fourlis | 177 | 9 | |
| Romania | Jaqueline Cristian | 180 | 10 | |
| Spain | Jéssica Bouzas Maneiro | 185 | 11 | |
| Antonia Ružić | 207 | 12 | ||
 Macedonia, the former Yugoslav Republic of | Lina Gjorcheska | 213 | 13 | |
| Romania | Alexandra Cadanțu-Ignatik | 217 | 14 | |
| Kristina Dmitruk | 227 | 15 | ||
| Tena Lukas | 232 | 16 |
The following players received wildcards into the singles main draw:
The following players received entry into the singles main draw using a special ranking:
The following players received entry from the qualifying draw:
Cristiana Ferrando
Denisa Hindová
Eszter Méri Andreea Mitu Adrienn Nagy Ivana Šebestová
Anastasiya SobolevaThe following player received entry as a lucky loser: