# 2018 Amex-Istanbul Challenger – Singles

Malek Jaziri was the defending champion but chose not to defend his title.
Corentin Moutet won the title after defeating Quentin Halys 6–3, 6–4 in the final.

## Seeds

* Thomas Fabbiano (semifinals)
* Corentin Moutet (champion)
* Adrián Menéndez Maceiras (first round)
* Quentin Halys (final)
* Constant Lestienne (second round)
* Oscar Otte (second round)
* Tallon Griekspoor (quarterfinals)
* Lucas Miedler (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 |
| 1 | Thomas Fabbiano | 3 | 6 | 4 | | | | |
| 4 | Quentin Halys | 6 | 4 | 6 | | | | |
| 4 | Quentin Halys | 6 | 4 | 6 | 4 | Quentin Halys | 3 | 4 |
| | | | | | 2 | Corentin Moutet | 6 | 6 |
| | Antoine Hoang | 6 | 5 | 0 | 2 | Corentin Moutet | 6 | 6 |
| 2 | Corentin Moutet | 2 | 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 | Semifinals |
| 1 | T Fabbiano | 6 | 6 | | | | | | | | | | | | | | | | |
| Alt | H Grenier | 3 | 2 | | 1 | T Fabbiano | 3 | 6 | 6 | | | | | | | | | | |
| | V Šafránek | 1 | 4 | | | B Bonzi | 6 | 1 | 4 | | | | | | | | | | |
| | B Bonzi | 6 | 6 | | | | | | | 1 | T Fabbiano | 3 | 6 | 6 | | | | | |
| | D Yevseyev | 6$^3$ | 4 | | | | | | | | M Viola | 6 | 2 | 4 | | | | | |
| | M Viola | 7$^7$ | 6 | | | M Viola | 6 | 6 | | | | | | | | | | | |
| | D Masur | 6 | 3 | 6$^5$ | 5 | C Lestienne | 3 | 1 | | | | | | | | | | | |
| 5 | C Lestienne | 0 | 6 | 7$^7$ | | | | | | | | | | | 1 | T Fabbiano | 3 | 6 | 4 |
| 4 | Q Halys | 6 | 6 | | | | | | | | | | | | 4 | Q Halys | 6 | 4 | 6 |
| WC | N Kuhn | 3 | 4 | | 4 | Q Halys | 7$^7$ | 6$^5$ | 6 | | | | | | | | | | |
| | A Nedovyesov | 6 | 6 | | | A Nedovyesov | 6$^4$ | 7$^7$ | 4 | | | | | | | | | | |
| WC | A Metreveli | 3 | 4 | | | | | | | 4 | Q Halys | 6 | 3 | 7$^7$ | | | | | |
| Q | Y Hossam | 6 | 6 | | | | | | | 7 | T Griekspoor | 4 | 6 | 6$^3$ | | | | | |
| WC | A Yüksel | 3 | 2 | | Q | Y Hossam | 3 | 2 | | | | | | | | | | | |
| Q | TK Wang | 4 | 1 | | 7 | T Griekspoor | 6 | 6 | | | | | | | | | | | |
| 7 | T Griekspoor | 6 | 6 | | | | | | | | | | | | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | L Miedler | 7 | 3 | | | | | | | | | | | | | | | |
| SE | E Couacaud | 5 | 0$^r$ | | 8 | L Miedler | 6 | 7$^7$ | | | | | | | | | | |
| Q | T van Rijthoven | 6$^7$ | 2 | | | E Benchetrit | 3 | 6$^2$ | | | | | | | | | | |
| | E Benchetrit | 7$^9$ | 6 | | | | | | | 8 | L Miedler | 4 | 5 | | | | | |
| | M Janvier | 6 | 3 | 4 | | | | | | | A Hoang | 6 | 7 | | | | | |
| | A Hoang | 4 | 6 | 6 | | A Hoang | 6$^0$ | 6 | 6 | | | | | | | | | |
| | G Oliveira | 6 | 2 | 6 | | G Oliveira | 7$^7$ | 3 | 2 | | | | | | | | | |
| 3 | A Menéndez Maceiras | 3 | 6 | 2 | | | | | | | | | | | A Hoang | 6 | 5 | 0 |
| 6 | O Otte | 6 | 6 | | | | | | | | | | | 2 | C Moutet | 2 | 7 | 6 |
| | J Ward | 3 | 3 | | 6 | O Otte | 3 | 4 | | | | | | | | | | |
| WC | E Kırkın | 2 | 6 | 4 | | C İlkel | 6 | 6 | | | | | | | | | | |
| | C İlkel | 6 | 4 | 6 | | | | | | | C İlkel | 6$^4$ | 3 | | | | | |
| | J Menezes | 7 | 6 | | | | | | | 2 | C Moutet | 7$^7$ | 6 | | | | | |
| Q | A Çelikbilek | 5 | 1 | | | J Menezes | 4 | 0 | | | | | | | | | | |
| | T Kamke | 4 | 2 | | 2 | C Moutet | 6 | 6 | | | | | | | | | | |
| 2 | C Moutet | 6 | 6 | | | | | | | | | | | | | | | |