2023 Iași Open

The 2023 Iași Open was a professional tennis tournament played on outdoor clay courts. It was the fourth edition of the men's tournament which is part of the 2023 ATP Challenger Tour and second edition of the women's tournament which is part of 2023 WTA 125 tournaments. It took place in Iași, Romania between 10 and 16 July 2023 for the men and between 17 and 23 July for the women.

Seeds

 * 1 Rankings as of 3 July 2023.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇷🇴 Cezar Crețu
 * 🇷🇴 Filip Cristian Jianu
 * 🇪🇸 Bernabé Zapata Miralles

The following player received entry into the singles main draw using a protected ranking:
 * Pablo Cuevas

The following players received entry into the singles main draw as alternates:
 * 🇨🇦 Steven Diez
 * Valentin Vacherot
 * 🇷🇸 Miljan Zekić

The following players received entry from the qualifying draw:
 * Andrey Chepelev
 * 🇷🇴 Sebastian Gima
 * 🇲🇰 Kalin Ivanovski
 * 🇫🇷 Kyrian Jacquet
 * 🇪🇸 Àlex Martí Pujolràs
 * 🇦🇷 Juan Bautista Otegui

The following player received entry as a lucky loser:
 * 🇨🇿 Michael Vrbenský

Seeds

 * 1 Rankings as of 3 July 2023.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇷🇴 Ilinca Amariei
 * 🇷🇴 Irina-Camelia Begu
 * Kristina Dmitruk
 * 🇷🇴 Andreea Prisăcariu
 * 🇷🇴 Anca Todoni

The following players received entry from the qualifying draw:
 * Veronika Erjavec
 * 🇹🇷 İpek Öz
 * Anastasia Tikhonova
 * Ekaterina Yashina

The following players received entry as lucky losers:
 * 🇷🇴 Oana Gavrilă
 * Conny Perrin

Withdrawals

 * Kristina Dmitruk → replaced by 🇷🇴 Oana Gavrilă
 * Ylena In-Albon → replaced by Conny Perrin

Seeds
† Rankings are as of 3 July 2023

Other entrants
The following pair received a wildcard entry into main draw:
 * 🇷🇴 Ilinca Amariei / 🇷🇴 Anca Todoni

Men's singles

 * 🇫🇷 Hugo Gaston def. 🇪🇸 Bernabé Zapata Miralles 3–6, 6–0, 6–4.

Women's singles

 * 🇷🇴 Ana Bogdan def. 🇷🇴 Irina-Camelia Begu, 6–2, 6–3

Men's doubles

 * 🇨🇴 Nicolás Barrientos / 🇵🇰 Aisam-ul-Haq Qureshi def. 🇷🇴 Gabi Adrian Boitan / 🇷🇴 Bogdan Pavel 6–3, 6–3.

Women's doubles

 * Veronika Erjavec / Dalila Jakupović def. 🇷🇴 Irina Bara / 🇷🇴 Monica Niculescu 6–4, 6–4