# 2018 Tunis Open – Singles

Simone Bolelli was the defending champion but chose not to defend his title.
Guido Andreozzi won the title after Daniel Gimeno Traver retired trailing 2–6, 0–3 in the final.

## Seeds

* Jiří Veselý (withdrew)
* Nikoloz Basilashvili (quarterfinals)
* Malek Jaziri (first round)
* Radu Albot (first round)
* Thomas Fabbiano (semifinals)
* Gastão Elias (second round)
* Pedro Sousa (quarterfinals, retired)
* Elias Ymer (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 | Semifinals | Final | Final | Final | Final |
| 5 | Thomas Fabbiano | 1 | 4 | | | | | |
| Q | Daniel Gimeno Traver | 6 | 6 | | | | | |
| Q | Daniel Gimeno Traver | 6 | 6 | | Q | Daniel Gimeno Traver | 2 | 0$^r$ |
| | | | | | | Guido Andreozzi | 6 | 3 |
| | João Domingues | 7 | 5 | 3 | | Guido Andreozzi | 6 | 3 |
| | Guido Andreozzi | 5 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| LL | D Masur | 3 | | | | | | | | | | | | | | | |
| WC | L Ouahab | 0$^r$ | | | LL | D Masur | 1 | 6 | 3 | | | | | | | | |
| | C Moutet | 7$^7$ | 6 | | | C Moutet | 6 | 4 | 6 | | | | | | | | |
| | L Broady | 6$^4$ | 3 | | | | | | | | C Moutet | 5 | 2 | | | | |
| Q | M Janvier | 6 | 6 | | | | | | | 5 | T Fabbiano | 7 | 6 | | | | |
| | C Ruud | 4 | 4 | | Q | M Janvier | 6 | 6$^5$ | 3 | | | | | | | | |
| Q | Z Piros | 2 | 6$^4$ | | 5 | T Fabbiano | 3 | 7$^7$ | 6 | | | | | | | | |
| 5 | T Fabbiano | 6 | 7$^7$ | | | | | | | | | | | 5 | T Fabbiano | 1 | 4 |
| 4 | R Albot | 1 | 1 | | | | | | | | | | | Q | D Gimeno Traver | 6 | 6 |
| | B Bonzi | 6 | 6 | | | B Bonzi | 4 | 6 | 3 | | | | | | | | |
| Q | L Rosol | 7 | 0 | | Q | L Rosol | 6 | 3 | 6 | | | | | | | | |
| | C Taberner | 5 | 0$^r$ | | | | | | | Q | L Rosol | 1 | 2 | | | | |
| | D Novak | 4 | 7 | 1 | | | | | | Q | D Gimeno Traver | 6 | 6 | | | | |
| Q | D Gimeno Traver | 6 | 5 | 6 | Q | D Gimeno Traver | 4 | 6 | 7$^7$ | | | | | | | | |
| | G Oliveira | 2 | 2 | | 6 | G Elias | 6 | 3 | 6$^2$ | | | | | | | | |
| 6 | G Elias | 6 | 6 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | P Sousa | 6 | 4 | 6 | | | | | | | | | | | | |
| | S Ofner | 3 | 6 | 2 | 7 | P Sousa | 6 | 6 | | | | | | | | |
| WC | M Echargui | 3 | 6$^3$ | | | J Zopp | 2 | 2 | | | | | | | | |
| | J Zopp | 6 | 7$^7$ | | | | | | 7 | P Sousa | 6 | 1$^r$ | | | | |
| | J Domingues | 6 | 6 | | | | | | | J Domingues | 4 | 3 | | | | |
| WC | Mohamed Ali Bellalouna | 0 | 0 | | | J Domingues | 6 | 7 | | | | | | | | |
| | J Kovalík | 6 | 7$^7$ | | | J Kovalík | 4 | 5 | | | | | | | | |
| 3 | M Jaziri | 4 | 6$^5$ | | | | | | | | | | J Domingues | 7 | 5 | 3 |
| 8 | E Ymer | 5 | 3 | | | | | | | | | | G Andreozzi | 5 | 7 | 6 |
| | E Gerasimov | 7 | 6 | | | E Gerasimov | 4 | 3 | | | | | | | | |
| | G Andreozzi | 6 | 7 | | | G Andreozzi | 6 | 6 | | | | | | | | |
| | S Napolitano | 2 | 5 | | | | | | | G Andreozzi | 6 | 6 | | | | |
| WC | A Popyrin | 4 | 7$^7$ | 6 | | | | | 2/SE | N Basilashvili | 1 | 2 | | | | |
| | N Milojević | 6 | 6$^4$ | 3 | WC | A Popyrin | 5 | 4 | | | | | | | | |
| | T Kamke | 4 | 3 | | 2/SE | N Basilashvili | 7 | 6 | | | | | | | | |
| 2/SE | N Basilashvili | 6 | 6 | | | | | | | | | | | | | |