# 2018 Guzzini Challenger – Singles

Viktor Galović was the defending champion but lost in the semifinals to Adrián Menéndez Maceiras.
Daniel Brands won the title after defeating Menéndez Maceiras 7–5, 6–3 in the final.

## Seeds

* Ramkumar Ramanathan (first round)
* Ilya Ivashka (quarterfinals)
* Quentin Halys (first round)
* Alexander Bublik (first round)
* Adrián Menéndez Maceiras (final)
* Viktor Galović (semifinals)
* Salvatore Caruso (quarterfinals)
* Hiroki Moriya (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 | Final | Final | Final | Final |
| PR | Daniel Brands | 6 | 6 | | | | |
| | Roberto Quiroz | 0 | 3 | | | | |
| | Roberto Quiroz | 0 | 3 | PR | Daniel Brands | 7 | 6 |
| | | | | 5 | Adrián Menéndez Maceiras | 5 | 3 |
| 5 | Adrián Menéndez Maceiras | 6 | 6 | 5 | Adrián Menéndez Maceiras | 5 | 3 |
| 6 | Viktor Galović | 1 | 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 |
| 1 | R Ramanathan | 6$^5$ | 6$^8$ | | | | | | | | | | | | | | |
| PR | D Brands | 7$^7$ | 7$^{10}$ | | PR | D Brands | 6 | 7 | | | | | | | | | |
| WC | E Dalla Valle | 4 | 4 | | | B Zapata Miralles | 4 | 5 | | | | | | | | | |
| | B Zapata Miralles | 6 | 6 | | | | | | | PR | D Brands | 6 | 7$^9$ | | | | |
| | F Argüello | 6 | 3 | 6 | | | | | | 7 | S Caruso | 4 | 6$^7$ | | | | |
| WC | R Brancaccio | 1 | 6 | 3 | | F Argüello | 4 | 2 | | | | | | | | | |
| | Ze Zhang | 4 | 6 | 5 | 7 | S Caruso | 6 | 6 | | | | | | | | | |
| 7 | S Caruso | 6 | 3 | 7 | | | | | | | | | | PR | D Brands | 6 | 6 |
| 3 | Q Halys | 6 | 6$^5$ | 4 | | | | | | | | | | | R Quiroz | 0 | 3 |
| WC | A Vavassori | 1 | 7$^7$ | 6 | WC | A Vavassori | 4 | 3 | | | | | | | | | |
| | D Petrović | 2 | 6 | 2 | | R Quiroz | 6 | 6 | | | | | | | | | |
| | R Quiroz | 6 | 3 | 6 | | | | | | | R Quiroz | 6 | 6 | | | | |
| | DE Galán | 2 | 4 | | | | | | | 8 | H Moriya | 4 | 2 | | | | |
| | L Rosol | 6 | 6 | | | L Rosol | 6 | 4 | 2 | | | | | | | | |
| | A Arnaboldi | 6$^6$ | 6 | 3 | 8 | H Moriya | 4 | 6 | 6 | | | | | | | | |
| 8 | H Moriya | 7$^8$ | 4 | 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 |
| 5 | A Menéndez Maceiras | 6 | 6 | | | | | | | | | | | | | | |
| WC | Giacomo Miccini | 2 | 1 | | 5 | A Menéndez Maceiras | 6 | 4 | 6 | | | | | | | | |
| Q | A Šetkić | 4 | 6 | 6 | Q | A Šetkić | 2 | 6 | 4 | | | | | | | | |
| Q | MT Barrios Vera | 6 | 3 | 4 | | | | | | 5 | A Menéndez Maceiras | 6 | 6 | | | | |
| | L Giustino | 4 | 6 | 6 | | | | | | | L Giustino | 4 | 2 | | | | |
| Q | A Basso | 6 | 4 | 4 | | L Giustino | 6 | 6$^2$ | 6 | | | | | | | | |
| | A Hoang | 7 | 6 | | | A Hoang | 3 | 7$^7$ | 0 | | | | | | | | |
| 4 | A Bublik | 5 | 1 | | | | | | | | | | | 5 | A Menéndez Maceiras | 6 | 6 |
| 6 | V Galović | 6$^5$ | 6 | 7$^7$ | | | | | | | | | | 6 | V Galović | 1 | 2 |
| Q | A Artuñedo | 7$^7$ | 1 | 6$^4$ | 6 | V Galović | 6 | 6 | | | | | | | | | |
| | R Cid Subervi | 6 | 6$^6$ | 2 | | D Guez | 3 | 4 | | | | | | | | | |
| | D Guez | 4 | 7$^8$ | 6 | | | | | | 6 | V Galović | 7 | 6 | | | | |
| | P Martínez | 4 | 4 | | | | | | | 2 | I Ivashka | 5 | 4 | | | | |
| | E Gerasimov | 6 | 6 | | | E Gerasimov | 5 | 4 | | | | | | | | | |
| | I Marchenko | 3 | 3 | | 2 | I Ivashka | 7 | 6 | | | | | | | | | |
| 2 | I Ivashka | 6 | 6 | | | | | | | | | | | | | | |