# 2018 Sparkassen ATP Challenger – Singles

Lorenzo Sonego was the defending champion but lost in the first round to Constant Lestienne.
Ugo Humbert won the title after defeating Pierre-Hugues Herbert 6–4, 6–2 in the final.

## Seeds

* Pierre-Hugues Herbert (final)
* Lukáš Lacko (first round)
* Jaume Munar (first round)
* Lorenzo Sonego (first round)
* Ričardas Berankis (quarterfinals)
* Ugo Humbert (champion)
* Yannick Maden (withdrew)
* Matthias Bachinger (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 |
| 1 | Pierre-Hugues Herbert | 7$^7$ | 6 | | | | | |
| | Dennis Novak | 6$^5$ | 4 | | | | | |
| | Dennis Novak | 6$^5$ | 4 | | 1 | Pierre-Hugues Herbert | 4 | 2 |
| | | | | | 6 | Ugo Humbert | 6 | 6 |
| 6 | Ugo Humbert | 6 | 6$^6$ | 6 | 6 | Ugo Humbert | 6 | 6 |
| | Grégoire Barrère | 4 | 7$^8$ | 3 | | | | |

### 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 | P-H Herbert | 7 | 6 | | | | | | | | | | | | | | |
| | T Brkić | 5 | 4 | | 1 | P-H Herbert | 7$^8$ | 6 | | | | | | | | | |
| WC | L Caruana | 4 | 7$^{10}$ | 6 | WC | L Caruana | 6$^6$ | 4 | | | | | | | | | |
| | S Robert | 6 | 6$^8$ | 2 | | | | | | 1 | P-H Herbert | 6 | 6 | | | | |
| | D Masur | 6 | 4 | 6$^4$ | | | | | | 5 | R Berankis | 3 | 2 | | | | |
| | O Otte | 0 | 6 | 7$^7$ | | O Otte | 2 | 7 | 2 | | | | | | | | |
| Q | Tobias Simon | 6$^5$ | 4 | | 5 | R Berankis | 6 | 5 | 6 | | | | | | | | |
| 5 | R Berankis | 7$^7$ | 6 | | | | | | | | | | | 1 | P-H Herbert | 7$^7$ | 6 |
| 3 | J Munar | 3 | 6$^3$ | | | | | | | | | | | | D Novak | 6$^5$ | 4 |
| Q | Kirill Kivattsev | 6 | 7$^7$ | | Q | K Kivattsev | 3 | 2 | | | | | | | | | |
| | S Stakhovsky | 6$^4$ | 3 | | | S Bolelli | 6 | 6 | | | | | | | | | |
| | S Bolelli | 7$^7$ | 6 | | | | | | | | S Bolelli | 6$^5$ | 6$^5$ | | | | |
| | S Caruso | 2 | 4 | | | | | | | | D Novak | 7$^7$ | 7$^7$ | | | | |
| | D Brown | 6 | 6 | | | D Brown | 2 | 7 | 4 | | | | | | | | |
| | D Novak | 1 | 6 | 7$^7$ | | D Novak | 6 | 5 | 6 | | | | | | | | |
| 8 | M Bachinger | 6 | 3 | 6$^1$ | | | | | | | | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | U Humbert | 6 | 6 | | | | | | | | | | | | | | | | |
| Q | B Hassan | 4 | 3 | | 6 | U Humbert | 6$^4$ | 6 | 6 | | | | | | | | | | |
| LL | Fabrizio Ornago | 6$^5$ | 4 | | | Q Halys | 7$^7$ | 3 | 4 | | | | | | | | | | |
| | Q Halys | 7$^7$ | 6 | | | | | | | 6 | U Humbert | 7$^{15}$ | 6 | | | | | | |
| WC | J Sinner | 7$^7$ | 6 | | | | | | | | C Lestienne | 6$^{13}$ | 3 | | | | | | |
| WC | Luca Giacomini | 6$^4$ | 1 | | WC | J Sinner | 7$^8$ | 5 | 5 | | | | | | | | | | |
| | C Lestienne | 6 | 4 | 6 | | C Lestienne | 6$^6$ | 7 | 7 | | | | | | | | | | |
| 4 | L Sonego | 1 | 6 | 4 | | | | | | | | | | | 6 | U Humbert | 6 | 6$^6$ | 6 |
| Q | K Krawietz | 7$^7$ | 4 | 7$^7$ | | | | | | | | | | | | G Barrère | 4 | 7$^8$ | 3 |
| | A Hoang | 6$^4$ | 6 | 6$^5$ | Q | K Krawietz | 3 | 5 | | | | | | | | | | | |
| | M Moraing | 6 | 6 | | | M Moraing | 6 | 7 | | | | | | | | | | | |
| WC | R Brancaccio | 2 | 2 | | | | | | | | M Moraing | 6 | 1 | 2 | | | | | |
| | G Barrère | 7 | 6$^6$ | 6 | | | | | | | G Barrère | 4 | 6 | 6 | | | | | |
| | S Napolitano | 5 | 7$^8$ | 2 | | G Barrère | 7$^7$ | 7$^7$ | | | | | | | | | | | |
| | A Pavić | 7$^9$ | 7$^{18}$ | | | A Pavić | 6$^1$ | 6$^3$ | | | | | | | | | | | |
| 2 | L Lacko | 6$^7$ | 6$^{16}$ | | | | | | | | | | | | | | | | |