2023 Croatia Open Umag
The 2023 Croatia Open was a men's tennis tournament played on outdoor clay courts. It was the 33rd edition of the Croatia Open, and part of the 250 Series of the 2023 ATP Tour. It took place at the International Tennis Center in Umag, Croatia, from 24 through 30 July 2023. Unseeded Alexei Popyrin won the singles title.
Finals
Singles
Alexei Popyrin defeated Stan Wawrinka, 6–7, 6–3, 6–4- It was Popyrin's only singles title of the year and the 2nd of his career.
Doubles
Blaž Rola / Nino Serdarušić defeated Simone Bolelli / Andrea Vavassori, 4–6, 7–6,Points and prize money
Prize money
| Event | W | F | SF | QF | Round of 16 | Round of 32 | Q2 | Q1 |
| Singles | €85,605 | €49,940 | €29,355 | €17,010 | €9,880 | €6,035 | €3,020 | €1,645 |
| Doubles* | €29,740 | €15,910 | €9,330 | €5,220 | €3,070 |
*per team
Singles main draw entrants
Seeds
1 Rankings are as of 17 July 2023.Other entrants
The following players received wildcards into the main draw:The following players received entry from the qualifying draw:
Withdrawals
Doubles main draw entrants
Seeds
1 Rankings as of 17 July 2023.Other entrants
The following pairs received wildcards into the doubles main draw:Withdrawals
- Patrik Niklas-Salminen / Bart Stevens → replaced by Marco Bortolotti / Sem Verbeek