# 2018 Brest Challenger – Singles

Corentin Moutet was the defending champion but lost in the second round to Julien Benneteau.
Hubert Hurkacz won the title after defeating Ričardas Berankis 7–5, 6–1 in the final.

## Seeds

* Julien Benneteau (quarterfinals)
* Jaume Munar (quarterfinals)
* Roberto Carballés Baena (semifinals)
* Hubert Hurkacz (champion)
* Jiří Veselý (second round)
* Ugo Humbert (withdrew)
* Lorenzo Sonego (quarterfinals)
* Michael Mmoh (first 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 | Final | Final | Final | Final |
| | Stefano Travaglia | 6$^1$ | 2$^r$ | | | | |
| 4 | Hubert Hurkacz | 7$^7$ | 4 | | | | |
| 4 | Hubert Hurkacz | 7$^7$ | 4 | 4 | Hubert Hurkacz | 7 | 6 |
| | | | | | Ričardas Berankis | 5 | 1 |
| 3 | Roberto Carballés Baena | 2 | 2 | | Ričardas Berankis | 5 | 1 |
| | Ričardas Berankis | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | J Benneteau | 6 | 6 | | | | | | | | | | | | | | |
| | M Moraing | 4 | 3 | | 1 | J Benneteau | 7 | 6 | | | | | | | | | |
| | C Moutet | 3 | 6 | 6 | | C Moutet | 5 | 4 | | | | | | | | | |
| | L Vanni | 6 | 2 | 3 | | | | | | 1 | J Benneteau | 6$^4$ | 3 | | | | |
| SE | F Baldi | 4 | 4 | | | | | | | | S Travaglia | 7$^7$ | 6 | | | | |
| | S Travaglia | 6 | 6 | | | S Travaglia | 6$^4$ | 6 | 7 | | | | | | | | |
| | S Robert | 4 | 6 | 2 | 5 | J Veselý | 7$^7$ | 2 | 5 | | | | | | | | |
| 5 | J Veselý | 6 | 3 | 6 | | | | | | | | | | | S Travaglia | 6$^1$ | 2$^r$ |
| 4 | H Hurkacz | 7$^7$ | 6 | | | | | | | | | | | 4 | H Hurkacz | 7$^7$ | 4 |
| WC | A Hoang | 6$^1$ | 3 | | 4 | H Hurkacz | 6 | 3 | 6 | | | | | | | | |
| Q | C Hemery | 3 | 7 | 6 | Q | C Hemery | 1 | 6 | 3 | | | | | | | | |
| | G Barrère | 6 | 5 | 3 | | | | | | 4 | H Hurkacz | 6 | 7$^7$ | | | | |
| Q | B Bonzi | 6 | 6 | | | | | | | Q | B Bonzi | 2 | 6$^2$ | | | | |
| | E López Pérez | 3 | 1 | | Q | B Bonzi | 7$^7$ | 6 | | | | | | | | | |
| Q | TK Wang | 6 | 7$^7$ | | Q | TK Wang | 6$^2$ | 4 | | | | | | | | | |
| LL | T Brkić | 2 | 6$^3$ | | | | | | | | | | | | | | |

### 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 | L Sonego | 7 | 6 | | | | | | | | | | | | | | |
| | Y Maden | 5 | 2 | | 7 | L Sonego | 7$^7$ | 6 | | | | | | | | | |
| | E Ymer | 6 | 6 | | | E Ymer | 6$^1$ | 3 | | | | | | | | | |
| Q | I Gakhov | 3 | 2 | | | | | | 7 | L Sonego | 4 | 6 | 4 | | | | |
| WC | Antoine Cornut-Chauvinc | 6 | 6 | | | | | | 3 | R Carballés Baena | 6 | 2 | 6 | | | | |
| SE | G Sakharov | 3 | 2 | | WC | A Cornut-Chauvinc | 3 | 5 | | | | | | | | | |
| | N Mahut | 6 | 6$^6$ | 3 | 3 | R Carballés Baena | 6 | 7 | | | | | | | | | |
| 3 | R Carballés Baena | 0 | 7$^8$ | 6 | | | | | | | | | | 3 | R Carballés Baena | 2 | 2 |
| 8 | M Mmoh | 2 | 4 | | | | | | | | | | | | R Berankis | 6 | 6 |
| | R Berankis | 6 | 6 | | | R Berankis | 6 | 6 | | | | | | | | | |
| | Q Halys | 4 | 7$^7$ | 6 | | Q Halys | 2 | 2 | | | | | | | | | |
| | S Bolelli | 6 | 6$^5$ | 3 | | | | | | R Berankis | 6 | 6 | | | | | |
| WC | C Denolly | 6 | 7$^7$ | | | | | | 2 | J Munar | 3 | 4 | | | | | |
| WC | M Martineau | 2 | 6$^5$ | | WC | C Denolly | 2 | 2 | | | | | | | | | |
| | C Lestienne | 1 | 3 | | 2 | J Munar | 6 | 6 | | | | | | | | | |
| 2 | J Munar | 6 | 6 | | | | | | | | | | | | | | |