| Singles | |
|---|---|
| 2018 Tunis Open | |
| Champion |  Guido Andreozzi |
| Runner-up |  Daniel Gimeno Traver |
| Score | 6–2, 3–0 ret. |
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. [1]
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)| Semifinals | Final | ||||||||||||
| 5 | Thomas Fabbiano | 1 | 4 | ||||||||||
| Q | Daniel Gimeno Traver | 6 | 6 | ||||||||||
| Q | Daniel Gimeno Traver | 2 | 0r | ||||||||||
| Guido Andreozzi | 6 | 3 | |||||||||||
| João Domingues | 7 | 5 | 3 | ||||||||||
| Guido Andreozzi | 5 | 7 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| LL |  D Masur | 3 | |||||||||||||||||||||||||
| WC |  L Ouahab | 0r | LL | D Masur | 1 | 6 | 3 | ||||||||||||||||||||
 C Moutet | 77 | 6 | C Moutet | 6 | 4 | 6 | |||||||||||||||||||||
 L Broady | 64 | 3 | C Moutet | 5 | 2 | ||||||||||||||||||||||
| Q | M Janvier | 6 | 6 | 5 | T Fabbiano | 7 | 6 | ||||||||||||||||||||
 C Ruud | 4 | 4 | Q | M Janvier | 6 | 65 | 3 | ||||||||||||||||||||
| Q |  Z Piros | 2 | 64 | 5 | T Fabbiano | 3 | 77 | 6 | |||||||||||||||||||
| 5 | T Fabbiano | 6 | 77 | 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 | 0r | 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 | 77 | ||||||||||||||||||
| G Oliveira | 2 | 2 | 6 | G Elias | 6 | 3 | 62 | ||||||||||||||||||||
| 6 | G Elias | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | P Sousa | 6 | 4 | 6 | |||||||||||||||||||||||
| S Ofner | 3 | 6 | 2 | 7 | P Sousa | 6 | 6 | ||||||||||||||||||||
| WC | M Echargui | 3 | 63 |  J Zopp | 2 | 2 | |||||||||||||||||||||
| J Zopp | 6 | 77 | 7 | P Sousa | 6 | 1r | |||||||||||||||||||||
| J Domingues | 6 | 6 | J Domingues | 4 | 3 | ||||||||||||||||||||||
| WC | Mohamed Ali Bellalouna | 0 | 0 | J Domingues | 6 | 7 | |||||||||||||||||||||
 J Kovalík | 6 | 77 | J Kovalík | 4 | 5 | ||||||||||||||||||||||
| 3 | M Jaziri | 4 | 65 | 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 | 77 | 6 | 2/SE | N Basilashvili | 1 | 2 | |||||||||||||||||||
 N Milojević | 6 | 64 | 3 | WC | A Popyrin | 5 | 4 | ||||||||||||||||||||
| T Kamke | 4 | 3 | 2/SE | N Basilashvili | 7 | 6 | |||||||||||||||||||||
| 2/SE | N Basilashvili | 6 | 6 | ||||||||||||||||||||||||
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