# 2018 Thindown Challenger Biella – Singles

Filip Krajinović was the defending champion but chose not to defend his title.
Federico Delbonis won the title after defeating Stefano Napolitano 6–4, 6–3 in the final.

## Seeds

* Roberto Carballés Baena (quarterfinals)
* Federico Delbonis (champion)
* Paolo Lorenzi (quarterfinals)
* Thiago Monteiro (semifinals)
* Marco Trungelliti (quarterfinals)
* Stefano Travaglia (semifinals)
* Gastão Elias (first round)
* Daniel Gimeno Traver (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 |
| | Stefano Napolitano | 6 | 5 | 6 | | | | |
| 6 | Stefano Travaglia | 3 | 7 | 2 | | | | |
| 6 | Stefano Travaglia | 3 | 7 | 2 | | Stefano Napolitano | 4 | 3 |
| | | | | | 2 | Federico Delbonis | 6 | 6 |
| 4/Alt | Thiago Monteiro | 2 | 3 | | 2 | Federico Delbonis | 6 | 6 |
| 2 | Federico Delbonis | 6 | 6 | | | | | |

### Top 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 | Semifinals |
| 1 | R Carballés Baena | 6 | 6 | | | | | | | | | | | | | | | |
| | L Giustino | 3 | 4 | | 1 | R Carballés Baena | 6 | 6 | | | | | | | | | | |
| Q | MT Barrios Vera | 6 | 5 | 7 | Q | MT Barrios Vera | 4 | 2 | | | | | | | | | | |
| | B Zapata Miralles | 2 | 7 | 5 | | | | | 1 | R Carballés Baena | 3 | 6 | 1 | | | | | |
| | V Galović | 2 | 6 | 4 | | | | | | S Napolitano | 6 | 3 | 6 | | | | | |
| WC | E Dalla Valle | 6 | 4 | 6 | WC | E Dalla Valle | 2 | 2 | | | | | | | | | | |
| | S Napolitano | 7$^7$ | 6 | | | S Napolitano | 6 | 6 | | | | | | | | | | |
| 8 | D Gimeno Traver | 6$^3$ | 3 | | | | | | | | | | | | S Napolitano | 6 | 5 | 6 |
| 3/WC | P Lorenzi | 6 | 6 | | | | | | | | | | | 6 | S Travaglia | 3 | 7 | 2 |
| Q | M Bourgue | 2 | 4 | | 3/WC | P Lorenzi | 6 | 6 | | | | | | | | | | |
| WC | Pietro Rondoni | 6 | 2 | 0 | | R Ojeda Lara | 2 | 1 | | | | | | | | | | |
| | R Ojeda Lara | 3 | 6 | 6 | | | | | 3/WC | P Lorenzi | 2 | 5 | | | | | | |
| | M Donati | 6 | 6 | | | | | | 6 | S Travaglia | 6 | 7 | | | | | | |
| LL | Oscar José Gutierrez | 3 | 3 | | | M Donati | 1 | 3$^r$ | | | | | | | | | | |
| LL | JP Varillas | 1 | 4 | | 6 | S Travaglia | 6 | 1 | | | | | | | | | | |
| 6 | S Travaglia | 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 |
| 5 | M Trungelliti | 4 | 6 | 6 | | | | | | | | | | | | |
| SE | A Davidovich Fokina | 6 | 3 | 4 | 5 | M Trungelliti | 7 | 7 | | | | | | | | |
| | L Grigelis | 4 | 6$^3$ | | | T Robredo | 5 | 5 | | | | | | | | |
| | T Robredo | 6 | 7$^7$ | | | | | | 5 | M Trungelliti | 1 | 2 | | | | |
| | O Roca Batalla | 7$^7$ | 2 | 3 | | | | | 4/Alt | T Monteiro | 6 | 6 | | | | |
| | A Arnaboldi | 6$^3$ | 6 | 6 | | A Arnaboldi | 3 | 1 | | | | | | | | |
| WC | A Pellegrino | 7$^7$ | 1 | 2 | 4/Alt | T Monteiro | 6 | 6 | | | | | | | | |
| 4/Alt | T Monteiro | 6$^4$ | 6 | 6 | | | | | | | | | 4/Alt | T Monteiro | 2 | 3 |
| 7 | G Elias | 5 | 0 | | | | | | | | | | 2 | F Delbonis | 6 | 6 |
| SE | F Argüello | 7 | 6 | | SE | F Argüello | 6 | 6 | | | | | | | | |
| | P Cachin | 3 | 7$^8$ | 4 | | F Baldi | 4 | 2 | | | | | | | | |
| | F Baldi | 6 | 6$^6$ | 6 | | | | | SE | F Argüello | 2 | 4 | | | | |
| Q | A Müller | 2 | 2 | | | | | | 2 | F Delbonis | 6 | 6 | | | | |
| | S Caruso | 6 | 6 | | | S Caruso | 3 | 5 | | | | | | | | |
| Q | J Šátral | 6 | 3 | 1 | 2 | F Delbonis | 6 | 7 | | | | | | | | |
| 2 | F Delbonis | 3 | 6 | 6 | | | | | | | | | | | | |