The 2023 Copa Oster was a professional tennis tournament played on outdoor clay courts. It was the eighth edition of the tournament and second as a WTA 125 tournament which is part of the 2023 WTA 125 tournaments. It took place at the Club Campestre in Cali, Colombia between 30 January and 5 February 2023. The event made a return to Cali after an absence of 10 years.
Champions
Singles
Nadia Podoroska def. Paula Ormaechea, 6–4, 6–2
Doubles
Weronika Falkowska / Katarzyna Kawa def. Kyōka Okamura / You Xiaodi, 6–1, 5–7, [10–6]
Singles main draw entrants
Seeds
1 Rankings as of 16 January 2023
Other entrants
The following players received wildcards into the singles main draw: Emiliana Arango María Herazo González Yuliana Lizarazo María Paulina Pérez
The following players received entry from the qualifying draw: Carolina Alves Martina Colmegna Quinn Gleason Marine Partaud
Withdrawals
Katharina Hobgarski → replaced by Gabriela Cé
Séléna Janicijevic → replaced by Nuria Brancaccio
Francesca Jones → replaced by Julia Riera
Magali Kempen → replaced by Jamie Loeb
Gabriela Lee → replaced by Whitney Osuigwe
Elizabeth Mandlik → replaced by Weronika Falkowska
Arantxa Rus → replaced by Valeriya Strakhova
Retirements
Whitney Osuigwe
Doubles main draw entrants
Seeds
1 Rankings as of 16 January 2023
Other entrants
The following teams received wildcards into the doubles main draw: Yuliana Lizarazo / María Paulina Pérez
Withdrawals
Aliona Bolsova / Caroline Dolehide → replaced by Renata Zarazúa / Emiliana Arango