| 2023 Zadar Open | |
|---|---|
| Date | 20–26 March |
| Edition | 3rd |
| Surface | Clay |
| Location | Zadar, Croatia |
| Champions | |
| Singles | |
 Alessandro Giannessi | |
| Doubles | |
 Manuel Guinard /  Nino Serdarušić | |
The 2023 Zadar Open was a professional tennis tournament played on clay courts. It was the third edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Zadar, Croatia between 20 and 26 March 2023.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 TPE | Tseng Chun-hsin | 125 | 1 |
 SVK | Jozef Kovalík | 145 | 2 |
 GBR | Ryan Peniston | 152 | 3 |
 AUT | Sebastian Ofner | 160 | 4 |
| ITA | Flavio Cobolli | 165 | 5 |
| FRA | |||
 CZE | Vít Kopřiva | 169 | 7 |
| FRA | Manuel Guinard | 177 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Mirza Bašić Giovanni Fonio 
Jeremy Jahn Julian Ocleppo David Pichler Giulio Zeppieri The following players received entry as lucky losers:
Alessandro Giannessi def. Sebastian Ofner 6–4, 5–7, 7–6(8–6). Manuel Guinard / Nino Serdarušić def. 
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