# 2023 Saint-Tropez Open – Singles

Mattia Bellucci was the defending champion but lost in the first round to Emilio Nava.
Constant Lestienne won the title after defeating Liam Broady 4–6, 6–3, 6–4 in the final.

## Seeds

* Ugo Humbert (withdrew)
* Sebastian Ofner (quarterfinals, retired)
* Grégoire Barrère (second round)
* Richard Gasquet (first round)
* Michael Mmoh (semifinals, retired)
* Hugo Gaston (first round)
* David Goffin (withdrew)
* Benjamin Bonzi (withdrew)
* Liam Broady (final)

## 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 | Final | Final | Final | Final | Final |
| | Radu Albot | 6$^3$ | 5 | | | | | |
| 9 | Liam Broady | 7$^7$ | 7 | | | | | |
| 9 | Liam Broady | 7$^7$ | 7 | 9 | Liam Broady | 6 | 3 | 4 |
| | | | | | Constant Lestienne | 4 | 6 | 6 |
| 5 | Michael Mmoh | 3$^r$ | | | Constant Lestienne | 4 | 6 | 6 |
| | Constant Lestienne | 5 | | | | | | |

### 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 |
| LL | K Jacquet | 2 | 5 | | | | | | | | | | | | | | | |
| Q | M Lajal | 6 | 7 | | Q | M Lajal | 5 | 1 | | | | | | | | | | |
| | G Brouwer | 6 | 6 | | | G Brouwer | 7 | 6 | | | | | | | | | | |
| LL | M Bourgue | 2 | 2 | | | | | | | | G Brouwer | 3 | 6 | 2 | | | | |
| | H Grenier | 4 | 3 | | | | | | | | R Albot | 6 | 3 | 6 | | | | |
| | R Albot | 6 | 6 | | | R Albot | 6 | 6 | | | | | | | | | | |
| LL | A Cozbinov | 4 | 3 | | Q | P Gojowczyk | 4 | 4 | | | | | | | | | | |
| Q | P Gojowczyk | 6 | 6 | | | | | | | | | | | | | R Albot | 6$^3$ | 5 |
| 3 | G Barrère | 6 | 6 | | | | | | | | | | | | 9 | L Broady | 7$^7$ | 7 |
| WC | A Géa | 2 | 4 | | 3 | G Barrère | 4 | 6 | 3 | | | | | | | | | |
| | A Cazaux | 6 | 6 | | | A Cazaux | 6 | 4 | 6 | | | | | | | | | |
| WC | U Blanchet | 4 | 4 | | | | | | | | A Cazaux | 6$^4$ | 0$^r$ | | | | | |
| | L Klein | 4 | 6 | 6 | | | | | | 9 | L Broady | 7$^7$ | 3 | | | | | |
| Q | Jules Marie | 6 | 3 | 3 | | L Klein | 2 | 2 | | | | | | | | | | |
| Q | D Added | 0 | 6 | 4 | 9 | L Broady | 6 | 6 | | | | | | | | | | |
| 9 | L Broady | 6 | 3 | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 5 | M Mmoh | 6 | 1 | 6 | | | | | | | | | | | | | |
| | J de Jong | 4 | 6 | 4 | 5 | M Mmoh | 6 | 6 | | | | | | | | | |
| | A Escoffier | 4 | 7$^7$ | 2 | LL | E Coulibaly | 4 | 2 | | | | | | | | | |
| LL | E Coulibaly | 6 | 6$^2$ | 6 | | | | | | 5 | M Mmoh | 3 | 6 | 6 | | | |
| | Em Nava | 4 | 6 | 7 | | | | | | | G Zeppieri | 6 | 3 | 4 | | | |
| Alt | M Bellucci | 6 | 1 | 5 | | Em Nava | 6$^2$ | 2 | | | | | | | | | |
| | G Zeppieri | 6 | 6 | | | G Zeppieri | 7$^7$ | 6 | | | | | | | | | |
| 4 | R Gasquet | 3 | 2 | | | | | | | | | | | | 5 | M Mmoh | 3$^r$ |
| 6 | H Gaston | 3 | 2 | | | | | | | | | | | | | C Lestienne | 5 |
| | C Lestienne | 6 | 6 | | | C Lestienne | 6 | 3 | 6 | | | | | | | | |
| Q | B Harris | 3 | 6 | 2 | Alt | H Mayot | 3 | 6 | 3 | | | | | | | | |
| Alt | H Mayot | 6 | 4 | 6 | | | | | | | C Lestienne | 6 | 0 | | | | |
| Q | O Krutykh | 2 | 6 | 7$^7$ | | | | | | 2 | S Ofner | 1 | 0$^r$ | | | | |
| | E Ymer | 6 | 3 | 6$^1$ | Q | O Krutykh | 6 | 3 | 4 | | | | | | | | |
| | L Nardi | 4 | 4 | | 2 | S Ofner | 4 | 6 | 6 | | | | | | | | |
| 2 | S Ofner | 6 | 6 | | | | | | | | | | | | | | |