# 2023 Open Saint-Brieuc – Singles

Jack Draper was the defending champion but chose not to defend his title.
Ričardas Berankis won the title after defeating Dan Added 6–3, 6–7$^{(3–7)}$, 7–6$^{(7–5)}$ in the final.

## Seeds

* Antoine Escoffier (quarterfinals)
* Li Tu (first round)
* Evan Furness (semifinals)
* Frederico Ferreira Silva (second round)
* Gauthier Onclin (second round)
* Raphaël Collignon (first round)
* Harold Mayot (quarterfinals)
* Ričardas Berankis (champion)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 8 | Ričardas Berankis | 6 | 7 | | | | | | |
| 3 | Evan Furness | 3 | 5 | | | | | | |
| 3 | Evan Furness | 3 | 5 | | 8 | Ričardas Berankis | 6 | 6$^3$ | 7$^7$ |
| | | | | | | Dan Added | 3 | 7$^7$ | 6$^5$ |
| WC | Pierre-Hugues Herbert | 6 | 2 | 3 | | Dan Added | 3 | 7$^7$ | 6$^5$ |
| | Dan Added | 4 | 6 | 6 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | A Escoffier | 6 | 6 | | | | | | | | | | | | | | | |
| Alt | C Chidekh | 2 | 4 | | 1 | A Escoffier | 6 | 4 | 7$^7$ | | | | | | | | | |
| | C Broom | 6$^5$ | 6 | 3 | | M Janvier | 4 | 6 | 6$^3$ | | | | | | | | | |
| | M Janvier | 7$^7$ | 1 | 6 | | | | | | 1 | A Escoffier | 6 | 3 | 2 | | | | |
| | K Żuk | 6$^6$ | 6 | 7$^7$ | | | | | | 8 | R Berankis | 2 | 6 | 6 | | | | |
| Q | M Bourgue | 7$^8$ | 3 | 6$^5$ | | K Żuk | 6$^6$ | 6 | 3 | | | | | | | | | |
| | C İlkel | 2 | 0 | | 8 | R Berankis | 7$^8$ | 2 | 6 | | | | | | | | | |
| 8 | R Berankis | 6 | 6 | | | | | | | | | | | | 8 | R Berankis | 6 | 7 |
| 3 | E Furness | 7 | 6 | | | | | | | | | | | | 3 | E Furness | 3 | 5 |
| Q | Jurgen Briand | 5 | 4 | | 3 | E Furness | 2 | 6 | 6 | | | | | | | | | |
| | S Fanselow | 6 | 6 | | | S Fanselow | 6 | 1 | 4 | | | | | | | | | |
| | A Hoang | 4 | 3 | | | | | | | 3 | E Furness | 6 | 6 | | | | | |
| | J Forejtek | 2 | 3 | | | | | | | 7 | H Mayot | 1 | 4 | | | | | |
| WC | S Gueymard Wayenburg | 6 | 6 | | WC | S Gueymard Wayenburg | 3 | 2 | | | | | | | | | | |
| Q | Alexandre Reco | 3 | 3 | | 7 | H Mayot | 6 | 6 | | | | | | | | | | |
| 7 | H Mayot | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | R Collignon | 7 | 3 | 3 | | | | | | | | | | | | | | |
| WC | P-H Herbert | 5 | 6 | 6 | WC | P-H Herbert | 7$^7$ | 7$^8$ | | | | | | | | | | |
| Q | Constantin Bittoun Kouzmine | 5 | 6 | 4 | | A Kachmazov | 6$^5$ | 6$^6$ | | | | | | | | | | |
| | A Kachmazov | 7 | 1 | 6 | | | | | | WC | P-H Herbert | 7 | 6 | | | | | |
| Alt | G Oradini | 1 | 6$^2$ | | | | | | | Q | L Poullain | 5 | 3 | | | | | |
| Q | Lucas Poullain | 6 | 7$^7$ | | Q | L Poullain | 6 | 7$^7$ | | | | | | | | | | |
| | Mathys Erhard | 5 | 3 | | 4 | F Ferreira Silva | 2 | 6$^4$ | | | | | | | | | | |
| 4 | F Ferreira Silva | 7 | 6 | | | | | | | | | | | WC | P-H Herbert | 6 | 2 | 3 |
| 5 | G Onclin | 6 | 6 | | | | | | | | | | | | D Added | 4 | 6 | 6 |
| | S Mochizuki | 2 | 4 | | 5 | G Onclin | 6$^5$ | 5 | | | | | | | | | | |
| | V Sachko | 3 | 3 | | Q | M Lajal | 7$^7$ | 7 | | | | | | | | | | |
| Q | M Lajal | 6 | 6 | | | | | | | Q | M Lajal | 5 | 3 | | | | | |
| Alt | C Hemery | 6 | 4 | 6 | | | | | | | D Added | 7 | 6 | | | | | |
| WC | Antoine Ghibaudo | 2 | 6 | 2 | Alt | C Hemery | 6 | 6$^7$ | 4 | | | | | | | | | |
| | D Added | 6 | 6 | | | D Added | 4 | 7$^9$ | 6 | | | | | | | | | |
| 2 | L Tu | 4 | 4 | | | | | | | | | | | | | | | |