2023 Croatia Open Umag

The 2023 Croatia Open (also known as the Plava Laguna Croatia Open Umag for sponsorship reasons) is a men's tennis tournament to be played on outdoor clay courts. It will be the 33rd edition of the Croatia Open, and part of the 250 Series of the 2023 ATP Tour. It will take place at the International Tennis Center in Umag, Croatia, from 24 through 30 July 2023.

Singles

 * 🇦🇺 Alexei Popyrin def. Stan Wawrinka, 6–7(5–7), 6–3, 6–4

Doubles

 * Blaž Rola / Nino Serdarušić def. 🇮🇹 Simone Bolelli / 🇮🇹 Andrea Vavassori, 4–6, 7–6(7–2), [15–13]

Prize money

 * per team

Seeds

 * 1 Rankings are as of 17 July 2023.

Other entrants
The following players received wildcards into the main draw:
 * Duje Ajduković
 * 🇪🇸 Martín Landaluce
 * Dino Prižmić

The following players received entry from the qualifying draw:
 * 🇦🇷 Facundo Bagnis
 * 🇮🇹 Flavio Cobolli
 * Jesper de Jong
 * 🇦🇹 Filip Misolic

Withdrawals

 * Holger Rune → replaced by 🇦🇷 Juan Manuel Cerúndolo

Seeds

 * 1 Rankings as of 17 July 2023.

Other entrants
The following pairs received wildcards into the doubles main draw:
 * Zvonimir Babić / Luka Mikrut
 * Blaž Rola / Nino Serdarušić

Withdrawals

 * 🇫🇮 Patrik Niklas-Salminen / Bart Stevens → replaced by 🇮🇹 Marco Bortolotti /  Sem Verbeek