# 2018 Internationaux de Tennis de Blois – Singles

Damir Džumhur was the defending champion but chose not to defend his title.
Scott Griekspoor won the title after defeating Félix Auger-Aliassime 6–4, 6–4 in the final.

## Seeds

* Pedro Sousa (first round)
* Calvin Hemery (withdrew)
* Henri Laaksonen (second round)
* Juan Ignacio Londero (quarterfinals)
* Félix Auger-Aliassime (final)
* Carlos Berlocq (second round)
* Stéphane Robert (semifinals)
* Christian Garín (quarterfinals)

## 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 |
| 5 | Félix Auger-Aliassime | 7$^7$ | 3 | 6 | | | | |
| | Thiemo de Bakker | 6$^2$ | 6 | 1 | | | | |
| | Thiemo de Bakker | 6$^2$ | 6 | 1 | 5 | Félix Auger-Aliassime | 4 | 4 |
| | | | | | | Scott Griekspoor | 6 | 6 |
| | Scott Griekspoor | 6 | 2 | 6 | | Scott Griekspoor | 6 | 6 |
| 7/WC | Stéphane Robert | 1 | 6 | 2 | | | | |

### 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 | Semifinals |
| 1 | P Sousa | 3 | 4 | | | | | | | | | | | | | | | |
| Q | T Lamasine | 6 | 6 | | Q | T Lamasine | 6 | 1 | 6 | | | | | | | | | |
| Q | M Ymer | 2 | 3 | | | K de Schepper | 4 | 6 | 1 | | | | | | | | | |
| | K de Schepper | 6 | 6 | | | | | | | Q | T Lamasine | 4 | 2 | | | | | |
| | D Gimeno Traver | 6 | 3 | 3 | | | | | | 5 | F Auger-Aliassime | 6 | 6 | | | | | |
| Q | MT Barrios Vera | 2 | 6 | 6 | Q | MT Barrios Vera | 3 | 4 | | | | | | | | | | |
| | A Basso | 3 | 2 | | 5 | F Auger-Aliassime | 6 | 6 | | | | | | | | | | |
| 5 | F Auger-Aliassime | 6 | 6 | | | | | | | | | | | 5 | F Auger-Aliassime | 7$^7$ | 3 | 6 |
| 3 | H Laaksonen | 7 | 2 | | | | | | | | | | | | T de Bakker | 6$^2$ | 6 | 1 |
| | E Benchetrit | 5 | 1$^r$ | | 3 | H Laaksonen | 6$^3$ | 4 | | | | | | | | | | |
| | T de Bakker | 6 | 6 | | | T de Bakker | 7$^7$ | 6 | | | | | | | | | | |
| | João Monteiro | 2 | 2 | | | | | | | | T de Bakker | 6 | 6 | | | | | |
| | B Bonzi | 2 | 3 | | | | | | | 8 | C Garín | 4 | 4 | | | | | |
| | M Janvier | 6 | 6 | | | M Janvier | 2 | 2 | | | | | | | | | | |
| WC | Jaimee Floyd Angele | 3 | 5 | | 8 | C Garín | 6 | 6 | | | | | | | | | | |
| 8 | C Garín | 6 | 7 | | | | | | | | | | | | | | | |

### 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 | Semifinals |
| 6 | C Berlocq | 3 | 6 | 7$^7$ | | | | | | | | | | | | | | | |
| Q | Jules Okala | 6 | 1 | 6$^5$ | 6 | C Berlocq | 6 | 6$^5$ | 4 | | | | | | | | | | |
| | S Griekspoor | 6 | 6 | | | S Griekspoor | 3 | 7$^7$ | 6 | | | | | | | | | | |
| | L Giustino | 4 | 1 | | | | | | | | S Griekspoor | 6 | 5 | 7 | | | | | |
| | M Bourgue | 4 | 6 | 4 | | | | | | 4 | JI Londero | 2 | 7 | 5 | | | | | |
| | C Lestienne | 6 | 2 | 1$^r$ | | M Bourgue | 5 | 6$^3$ | | | | | | | | | | | |
| | J Domingues | 3 | 4 | | 4 | JI Londero | 7 | 7$^7$ | | | | | | | | | | | |
| 4 | JI Londero | 6 | 6 | | | | | | | | | | | | | S Griekspoor | 6 | 2 | 6 |
| 7/WC | S Robert | 6 | 7$^7$ | | | | | | | | | | | | 7/WC | S Robert | 1 | 6 | 2 |
| | M Vilella Martínez | 4 | 6$^4$ | | 7/WC | S Robert | 6$^4$ | 6 | 6 | | | | | | | | | | |
| SE | R Marcora | 6 | 6 | | SE | R Marcora | 7$^7$ | 3 | 3 | | | | | | | | | | |
| WC | A Müller | 1 | 3 | | | | | | | 7/WC | S Robert | 6 | 6 | | | | | | |
| SE | J Tatlot | 2$^r$ | | | | | | | | | P Cachin | 3 | 0 | | | | | | |
| | P Cachin | 5 | | | | P Cachin | 6$^9$ | 7$^8$ | 6 | | | | | | | | | | |
| | F Ferreira Silva | 6 | 5 | 6$^6$ | LL | H Heliövaara | 7$^{11}$ | 6$^6$ | 2 | | | | | | | | | | |
| LL | H Heliövaara | 3 | 7 | 7$^8$ | | | | | | | | | | | | | | | |