| 2023 Open Saint-Brieuc | |
|---|---|
| Date | 20–26 March |
| Edition | 18th |
| Surface | Hard (indoor) |
| Location | Saint-Brieuc, France |
| Champions | |
| Singles | |
 Ričardas Berankis | |
| Doubles | |
 Dan Added / Albano Olivetti | |
The 2023 Open Saint-Brieuc was a professional tennis tournament played on hard courts. It was the 18th edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Saint-Brieuc, France between 20 and 26 March 2023.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| FRA | Antoine Escoffier | 197 | 1 |
 AUS | Li Tu | 211 | 2 |
| FRA | Evan Furness | 223 | 3 |
 POR | Frederico Ferreira Silva | 226 | 4 |
 BEL | Gauthier Onclin | 228 | 5 |
| BEL | Raphaël Collignon | 238 | 6 |
| FRA | Harold Mayot | 251 | 7 |
| LTU | Ričardas Berankis | 253 | 8 |
The following players received wildcards into the singles main draw:
Antoine Ghibaudo Sascha Gueymard Wayenburg Pierre-Hugues Herbert The following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
Constantin Bittoun Kouzmine Mathias Bourgue Jurgen Briand
Mark Lajal Lucas Poullain Alexandre Reco Ričardas Berankis def. Dan Added 6–3, 6–7(3–7), 7–6(7–5). Dan Added / Albano Olivetti def. 
Patrik Niklas-Salminen / 
Bart Stevens 4–6, 7–6(9–7), [10–6].