# 2018 Cassis Open Provence – Singles

This was the first edition of the tournament.
Enzo Couacaud won the title after defeating Ugo Humbert 6–2, 6–3 in the final.

## Seeds

* Ričardas Berankis (first round)
* Corentin Moutet (first round)
* Adrián Menéndez Maceiras (semifinals)
* Sergiy Stakhovsky (first round)
* Ugo Humbert (final)
* Bernard Tomic (first round)
* Grégoire Barrère (first round)
* Mats Moraing (second round, retired)

## 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 |
| Q | Enzo Couacaud | 6 | 6 | | | | |
| 3 | Adrián Menéndez Maceiras | 4 | 4 | | | | |
| 3 | Adrián Menéndez Maceiras | 4 | 4 | Q | Enzo Couacaud | 6 | 6 |
| | | | | 5 | Ugo Humbert | 2 | 3 |
| | James Ward | 6$^3$ | 4 | 5 | Ugo Humbert | 2 | 3 |
| 5 | Ugo Humbert | 7$^7$ | 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 | R Berankis | 7$^7$ | 3 | 4 | | | | | | | | | | | | | | |
| Q | E Couacaud | 6$^5$ | 6 | 6 | Q | E Couacaud | 6 | 6 | | | | | | | | | | |
| | G Oliveira | 3 | 1 | | | M Bachinger | 4 | 3 | | | | | | | | | | |
| | M Bachinger | 6 | 6 | | | | | | | Q | E Couacaud | 3 | 6 | 6 | | | | |
| | S Griekspoor | 6 | 6 | | | | | | | | S Griekspoor | 6 | 4 | 1 | | | | |
| | E Karlovskiy | 4 | 4 | | | S Griekspoor | 6 | | | | | | | | | | | |
| | N Gombos | 6$^6$ | 5 | | 8 | M Moraing | 5$^r$ | | | | | | | | | | | |
| 8 | M Moraing | 7$^8$ | 7 | | | | | | | | | | | | Q | E Couacaud | 6 | 6 |
| 3 | A Menéndez Maceiras | 7$^9$ | 6 | | | | | | | | | | | | 3 | A Menéndez Maceiras | 4 | 4 |
| WC | A Rinderknech | 6$^7$ | 3 | | 3 | A Menéndez Maceiras | 6 | 7 | | | | | | | | | | |
| WC | A Müller | 6 | 6 | | WC | A Müller | 2 | 5 | | | | | | | | | | |
| Q | D Evans | 3 | 4 | | | | | | | 3 | A Menéndez Maceiras | 6 | 6$^5$ | 6 | | | | |
| WC | E Benchetrit | 6 | 6 | | | | | | | | A Hoang | 2 | 7$^7$ | 3 | | | | |
| Q | TK Wang | 1 | 4 | | WC | E Benchetrit | 4 | 7$^7$ | 1 | | | | | | | | | |
| | A Hoang | 3 | 7$^7$ | 7 | | A Hoang | 6 | 6$^5$ | 6 | | | | | | | | | |
| 7 | G Barrère | 6 | 6$^2$ | 5 | | | | | | | | | | | | | | |

### 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 | Semifinals |
| 6 | B Tomic | 7$^7$ | 5 | 5 | | | | | | | | | | | | | | |
| | T Griekspoor | 6$^5$ | 7 | 7 | | T Griekspoor | 6$^1$ | 6 | 3 | | | | | | | | | |
| | N Milojević | 4 | 7 | 4 | | J Ward | 7$^7$ | 3 | 6 | | | | | | | | | |
| | J Ward | 6 | 5 | 6 | | | | | | | J Ward | 7$^9$ | 3 | 6 | | | | |
| | O Roca Batalla | 6 | 6 | | | | | | | | O Otte | 6$^7$ | 6 | 3 | | | | |
| Q | Jonathan Kanar | 3 | 4 | | | O Roca Batalla | 3 | 4 | | | | | | | | | | |
| | O Otte | 7$^7$ | 3 | 7 | | O Otte | 6 | 6 | | | | | | | | | | |
| 4 | S Stakhovsky | 6$^2$ | 6 | 5 | | | | | | | | | | | | J Ward | 6$^3$ | 4 |
| 5 | U Humbert | 7$^7$ | 6 | | | | | | | | | | | | 5 | U Humbert | 7$^7$ | 6 |
| | C İlkel | 6$^5$ | 4 | | 5 | U Humbert | 6 | 7$^7$ | | | | | | | | | | |
| | T Kamke | 7 | 6 | | | T Kamke | 4 | 6$^4$ | | | | | | | | | | |
| | A Nedovyesov | 5 | 4 | | | | | | | 5 | U Humbert | 6 | 6 | | | | | |
| WC | M Bourgue | 7$^7$ | 1 | | | | | | | WC | M Bourgue | 3 | 3 | | | | | |
| | V Šafránek | 6$^5$ | 0$^r$ | | WC | M Bourgue | 6 | 6 | | | | | | | | | | |
| | Q Halys | 7$^7$ | 6 | | | Q Halys | 0 | 4 | | | | | | | | | | |
| 2 | C Moutet | 6$^4$ | 4 | | | | | | | | | | | | | | | |