| 2018 Cassis Open Provence | |
|---|---|
| Date | 4–9 September |
| Edition | 1st |
| Surface | Hard |
| Location | Cassis, France |
| Champions | |
| Singles | |
 Enzo Couacaud | |
| Doubles | |
 Matt Reid /  Sergiy Stakhovsky | |
The 2018 Cassis Open Provence was a professional tennis tournament played on hard courts. It was the 1st edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Cassis, France between 4 and 9 September 2018.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 LTU
|
Ričardas Berankis | 104 | 1 |
| FRA
|
Corentin Moutet | 112 | 2 |
 ESP
|
Adrián Menéndez Maceiras | 114 | 3 |
| UKR
|
Sergiy Stakhovsky | 138 | 4 |
| FRA
|
Ugo Humbert | 139 | 5 |
| AUS
|
Bernard Tomic | 152 | 6 |
| FRA
|
Grégoire Barrère | 153 | 7 |
 GER
|
Mats Moraing | 154 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Enzo Couacaud
Dan Evans Jonathan Kanar Tak Khunn Wang Enzo Couacaud def. Ugo Humbert 6–2, 6–3. Matt Reid / Sergiy Stakhovsky def. 
Marc-Andrea Hüsler / 
Gonçalo Oliveira 6–2, 6–3.
