# 2018 Internazionali di Tennis Castel del Monte – Singles

Uladzimir Ignatik was the defending champion but lost in the second round to Ugo Humbert.
Humbert won the title after defeating Filippo Baldi 6–4, 7–6$^{(7–3)}$ in the final.

## Seeds

* Ugo Humbert (champion)
* Lorenzo Sonego (second round)
* Paolo Lorenzi (second round)
* Adrián Menéndez Maceiras (first round)
* Sergiy Stakhovsky (quarterfinals)
* Quentin Halys (semifinals)
* Corentin Moutet (second round)
* Filippo Baldi (final)

## 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 |
| 1 | Ugo Humbert | 6 | 6 | | | | |
| | Kevin Krawietz | 3 | 2 | | | | |
| | Kevin Krawietz | 3 | 2 | 1 | Ugo Humbert | 6 | 7$^7$ |
| | | | | 8 | Filippo Baldi | 4 | 6$^3$ |
| 6 | Quentin Halys | 4 | 4 | 8 | Filippo Baldi | 4 | 6$^3$ |
| 8 | Filippo Baldi | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | U Humbert | 7$^7$ | 6 | | | | | | | | | | | | | | | |
| | G Oliveira | 6$^4$ | 3 | | 1 | U Humbert | 7$^8$ | 6 | | | | | | | | | | |
| | Z Kolář | 6$^4$ | 3 | | | U Ignatik | 6$^6$ | 3 | | | | | | | | | | |
| | U Ignatik | 7$^7$ | 6 | | | | | | | 1 | U Humbert | 6 | 6 | | | | | |
| WC | L Caruana | 6 | 6$^5$ | 7 | | | | | | 5 | S Stakhovsky | 0 | 4 | | | | | |
| LL | A Erler | 1 | 7$^7$ | 5 | WC | L Caruana | 4 | 0 | | | | | | | | | | |
| | M Viola | 1 | 5 | | 5 | S Stakhovsky | 6 | 6 | | | | | | | | | | |
| 5 | S Stakhovsky | 6 | 7 | | | | | | | | | | | | 1 | U Humbert | 6 | 6 |
| 4 | A Menéndez Maceiras | 6$^5$ | 6$^{10}$ | | | | | | | | | | | | | K Krawietz | 3 | 2 |
| LL | M-A Hüsler | 7$^7$ | 7$^{12}$ | | LL | M-A Hüsler | 7 | 3 | 6$^1$ | | | | | | | | | |
| | K Krawietz | 7$^7$ | 7$^7$ | | | K Krawietz | 5 | 6 | 7$^7$ | | | | | | | | | |
| | G Mager | 6$^3$ | 6$^5$ | | | | | | | | K Krawietz | 7$^7$ | 4 | 7$^7$ | | | | |
| | F Gaio | 6 | 4 | 6 | | | | | | | F Gaio | 6$^4$ | 6 | 6$^5$ | | | | |
| | A Davidovich Fokina | 2 | 6 | 4 | | F Gaio | 7 | 6 | | | | | | | | | | |
| Alt | A Bega | 3 | 3 | | 7 | C Moutet | 5 | 3 | | | | | | | | | | |
| 7 | C Moutet | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | Q Halys | 3 | 6 | 6 | | | | | | | | | | | | | |
| | V Galović | 6 | 3 | 4 | 6 | Q Halys | 6 | 7$^7$ | | | | | | | | | |
| | R Brancaccio | 3 | 5 | | | L Grigelis | 3 | 6$^3$ | | | | | | | | | |
| | L Grigelis | 6 | 7 | | | | | | 6 | Q Halys | 3 | | | | | | |
| | R Marcora | 7 | 1 | 7$^7$ | | | | | | R Marcora | 1$^r$ | | | | | | |
| Q | Lorenzo Frigerio | 5 | 6 | 6$^4$ | | R Marcora | 6 | 7$^9$ | | | | | | | | | |
| WC | A Pellegrino | 4 | 2 | | 3 | P Lorenzi | 3 | 6$^7$ | | | | | | | | | |
| 3 | P Lorenzi | 6 | 6 | | | | | | | | | | | 6 | Q Halys | 4 | 4 |
| 8 | F Baldi | 6 | 7$^8$ | | | | | | | | | | | 8 | F Baldi | 6 | 6 |
| | Y Jankovits | 3 | 6$^6$ | | 8 | F Baldi | 7$^8$ | 6 | | | | | | | | | |
| WC | J Ocleppo | 4 | 4 | | Q | A Šetkić | 6$^6$ | 4 | | | | | | | | | |
| Q | A Šetkić | 6 | 6 | | | | | | 8 | F Baldi | 6 | 2 | 7 | | | | |
| WC | J Sinner | 6 | 2 | 4 | | | | | Q | I Marchenko | 2 | 6 | 5 | | | | |
| Q | I Marchenko | 4 | 6 | 6 | Q | I Marchenko | 6 | 6 | | | | | | | | | |
| Q | Tobias Simon | 6$^1$ | 7 | 5 | 2 | L Sonego | 4 | 4 | | | | | | | | | |
| 2 | L Sonego | 7$^7$ | 5 | 7 | | | | | | | | | | | | | |