| Singles | |
|---|---|
| 2023 Copa Oster | |
| Champion |  Nadia Podoroska |
| Runner-up | Paula Ormaechea |
| Score | 6–4, 6–2 |
This was the first WTA 125 tournament in Cali since 2013. Lara Arruabarrena was the champion when the event was last held, but she retired from professional tennis in August 2022. [1]
Nadia Podoroska won the title, defeating Paula Ormaechea in the final, 6–4, 6–2. [2]
Réka Luca Jani (first round)
Laura Pigossi (semifinals)
Aliona Bolsova (second round) María Lourdes Carlé (first round)
Caroline Dolehide (first round) Hailey Baptiste (first round)
Carol Zhao (first round)
Fernanda Contreras Gómez (quarterfinals)| Semifinals | Final | ||||||||||||
| Nadia Podoroska | 6 | 6 | |||||||||||
| WC |  Emiliana Arango | 4 | 1 | ||||||||||
| Nadia Podoroska | 6 | 6 | |||||||||||
| Paula Ormaechea | 4 | 2 | |||||||||||
| Paula Ormaechea | 7 | 6 | |||||||||||
| 2 | Laura Pigossi | 5 | 3 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | RL Jani | 0 | 2 | ||||||||||||||||||||||||
| N Podoroska | 6 | 6 | N Podoroska | 4 | 6 | 6 | |||||||||||||||||||||
| J Loeb | 3 | 4 |  C Monnet | 6 | 3 | 1 | |||||||||||||||||||||
| C Monnet | 6 | 6 | N Podoroska | 6 | 6 | ||||||||||||||||||||||
| WC | MP Pérez | 0 | 4 | 8 | F Contreras Gómez | 3 | 3 | ||||||||||||||||||||
 X You | 6 | 6 | X You | 2 | 0 | ||||||||||||||||||||||
| Q | M Partaud | 1 | 6 | 1 | 8 | F Contreras Gómez | 6 | 6 | |||||||||||||||||||
| 8 | F Contreras Gómez | 6 | 1 | 6 | N Podoroska | 6 | 6 | ||||||||||||||||||||
| 4 | ML Carlé | 4 | 2 | WC | E Arango | 4 | 1 | ||||||||||||||||||||
| Q |  M Colmegna | 6 | 6 | Q | M Colmegna | 7 | 6 | ||||||||||||||||||||
| WC | Y Lizarazo | 4 | WC | Y Lizarazo | 5 | 4 | |||||||||||||||||||||
| W Osuigwe | 2r | Q | M Colmegna | 1 | 5 | ||||||||||||||||||||||
| R Zarazúa | 64 | 6 | 6 | WC | E Arango | 6 | 7 | ||||||||||||||||||||
| J Aney | 77 | 0 | 1 | R Zarazúa | 3 | 3 | |||||||||||||||||||||
| WC | E Arango | 6 | 6 | WC | E Arango | 6 | 6 | ||||||||||||||||||||
| 7 | C Zhao | 4 | 3 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | H Baptiste | 7 | 64 | 4 | |||||||||||||||||||||||
| E Kalieva | 5 | 77 | 6 | E Kalieva | 6 | 4 | 6 | ||||||||||||||||||||
| N Brancaccio | 7 | 6 | N Brancaccio | 3 | 6 | 2 | |||||||||||||||||||||
| J Riera | 5 | 3 | E Kalieva | 5 | 6 | 3 | |||||||||||||||||||||
 W Falkowska | 7 | 0 | 1 | P Ormaechea | 7 | 3 | 6 | ||||||||||||||||||||
| P Ormaechea | 5 | 6 | 6 | P Ormaechea | 77 | 6 | |||||||||||||||||||||
| K Kawa | 61 | 5 | 3 | A Bolsova | 64 | 3 | |||||||||||||||||||||
| 3 | A Bolsova | 77 | 7 | P Ormaechea | 7 | 6 | |||||||||||||||||||||
| 5 | C Dolehide | 65 | 6 | 64 | 2 | L Pigossi | 5 | 3 | |||||||||||||||||||
| Q | C Alves | 77 | 3 | 77 | Q | C Alves | 1 | 7 | 1 | ||||||||||||||||||
| WC | M Herazo González | 2 | 2 |  V Strakhova | 6 | 5 | 6 | ||||||||||||||||||||
| V Strakhova | 6 | 6 | V Strakhova | 3 | 6 | 3 | |||||||||||||||||||||
 R Șerban | 5 | 6 | 77 | 2 | L Pigossi | 6 | 3 | 6 | |||||||||||||||||||
| Q | Q Gleason | 7 | 1 | 64 | R Șerban | 2 | 3 | ||||||||||||||||||||
| G Cé | 1 | 1 | 2 | L Pigossi | 6 | 6 | |||||||||||||||||||||
| 2 | L Pigossi | 6 | 6 | ||||||||||||||||||||||||
Carolina Alves (qualified)
Kyōka Okamura (first round)
Luisa Meyer auf der Heide (first round) Valeriya Strakhova (moved to main draw) Martina Colmegna (qualified) Marine Partaud (qualified)
Olivia Tjandramulia (first round)
Amina Anshba (qualifying competition)| First round | Qualifying competition | ||||||||||||
| 1 | Carolina Alves | 6 | 6 | ||||||||||
| Alexandra Riley | 0 | 0 | |||||||||||
| 1 | Carolina Alves | 6 | 6 | ||||||||||
| Emily Seibold | 4 | 3 | |||||||||||
| Emily Seibold | 6 | 6 | |||||||||||
| 7 | Olivia Tjandramulia | 2 | 1 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 2 | Kyōka Okamura | 2 | 3 | ||||||||||
| Cadence Brace | 6 | 6 | |||||||||||
| Cadence Brace | 1 | 4 | |||||||||||
| 5 | Martina Colmegna | 6 | 6 | ||||||||||
| Sabastiani León | 0 | 0 | |||||||||||
| 5 | Martina Colmegna | 6 | 6 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| 3 | Luisa Meyer auf der Heide | 1 | 1 | ||||||||||
| PR | Quinn Gleason | 6 | 6 | ||||||||||
| PR | Quinn Gleason | 4 | 6 | 6 | |||||||||
| 8 | Amina Anshba | 6 | 4 | 2 | |||||||||
| WC | María Paula Vargas Triana | 0 | 0 | ||||||||||
| 8 | Amina Anshba | 6 | 6 | ||||||||||
| First round | Qualifying competition | ||||||||||||
| Alt | María Torres Murcia | 3 | 2 | ||||||||||
| Yuliana Monroy | 6 | 6 | |||||||||||
| Yuliana Monroy | 6 | 3 | 1 | ||||||||||
| 6 | Marine Partaud | 4 | 6 | 6 | |||||||||
| WC | María Paz Ospina | 0 | 1 | ||||||||||
| 6 | Marine Partaud | 6 | 6 | ||||||||||
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