# 2023 Cassis Open Provence – Singles

Hugo Grenier was the defending champion but chose not to defend his title.
Mattia Bellucci won the title after defeating Tomáš Macháč 6–3, 6–4 in the final.

## Seeds

* Alexandre Müller (semifinals)
* Liam Broady (semifinals)
* Benjamin Bonzi (first round)
* Tomáš Macháč (final)
* Giulio Zeppieri (quarterfinals)
* Antoine Escoffier (withdrew)
* Mattia Bellucci (champion)
* Federico Gaio (second round)

## 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 |
| 1 | Alexandre Müller | 6 | 3 | 6$^8$ | | | | |
| 4 | Tomáš Macháč | 3 | 6 | 7$^{10}$ | | | | |
| 4 | Tomáš Macháč | 3 | 6 | 7$^{10}$ | 4 | Tomáš Macháč | 3 | 4 |
| | | | | | 7 | Mattia Bellucci | 6 | 6 |
| 7 | Mattia Bellucci | 6 | 6 | | 7 | Mattia Bellucci | 6 | 6 |
| 2 | Liam Broady | 3 | 4 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | A Müller | 6 | 2 | 7 | | | | | | | | | | | | | |
| | J Sousa | 3 | 6 | 5 | 1 | A Müller | 6 | 6 | | | | | | | | | |
| | L Lokoli | 7$^7$ | 7 | | | L Lokoli | 3 | 2 | | | | | | | | | |
| | U Blanchet | 6$^4$ | 5 | | | | | | 1 | A Müller | 6 | 6 | | | | | |
| | M Janvier | 6 | 6 | | | | | | 5 | G Zeppieri | 4 | 2 | | | | | |
| Q | Christian Langmo | 3 | 3 | | | M Janvier | 5 | 5 | | | | | | | | | |
| Q | A Holmgren | 3 | 3 | | 5 | G Zeppieri | 7 | 7 | | | | | | | | | |
| 5 | G Zeppieri | 6 | 6 | | | | | | | | | | 1 | A Müller | 6 | 3 | 6$^8$ |
| 4 | T Macháč | 6 | 6 | | | | | | | | | | 4 | T Macháč | 3 | 6 | 7$^{10}$ |
| WC | S Gueymard Wayenburg | 2 | 4 | | 4 | T Macháč | 6 | 6 | | | | | | | | | |
| | N Mejía | 4 | 6 | 6 | | N Mejía | 4 | 4 | | | | | | | | | |
| WC | A Hoang | 6 | 3 | 3 | | | | | 4 | T Macháč | 7$^7$ | 6 | | | | | |
| | M Echargui | 7$^8$ | 6$^1$ | 3 | | | | | | A Moro Cañas | 6$^5$ | 1 | | | | | |
| | A Moro Cañas | 6$^6$ | 7$^7$ | 6 | | A Moro Cañas | 6 | 6 | | | | | | | | | |
| | K Ivanovski | 6 | 3 | 4 | 8 | F Gaio | 3 | 2 | | | | | | | | | |
| 8 | F Gaio | 1 | 6 | 6 | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | M Bellucci | 6 | 6 | | | | | | | | | | | | | | |
| Q | R Ramanathan | 2 | 4 | | 7 | M Bellucci | 6 | 6 | | | | | | | | | |
| | Jules Marie | 6 | 6$^3$ | 6$^4$ | | M Neuchrist | 2 | 3 | | | | | | | | | |
| | M Neuchrist | 2 | 7$^7$ | 7$^7$ | | | | | 7 | M Bellucci | 1 | 6 | 6 | | | | |
| Q | C Broom | 6 | 7 | | | | | | | L Poullain | 6 | 3 | 0 | | | | |
| LL | A McHugh | 2 | 5 | | Q | C Broom | 6$^5$ | 4 | | | | | | | | | |
| | Lucas Poullain | 6 | 6 | | | L Poullain | 7$^7$ | 6 | | | | | | | | | |
| 3 | B Bonzi | 3 | 1 | | | | | | | | | | | 7 | M Bellucci | 6 | 6 |
| LL | E Møller | 6 | 6 | | | | | | | | | | | 2 | L Broady | 3 | 4 |
| Q | E Benchetrit | 3 | 1 | | LL | E Møller | 1 | 5 | | | | | | | | | |
| | M Lajal | 3 | 6$^6$ | | | B Harris | 6 | 7 | | | | | | | | | |
| | B Harris | 6 | 7$^8$ | | | | | | | B Harris | 4 | 3 | | | | | |
| Q | D Cox | 2 | 6$^6$ | | | | | | 2 | L Broady | 6 | 6 | | | | | |
| | F Ferreira Silva | 6 | 7$^8$ | | | F Ferreira Silva | 2 | 2 | | | | | | | | | |
| | D Added | 0 | 2 | | 2 | L Broady | 6 | 6 | | | | | | | | | |
| 2 | L Broady | 6 | 6 | | | | | | | | | | | | | | |