# 2020 Sparkassen ATP Challenger – Singles

Jannik Sinner was the defending champion but chose not to defend his title.
Ilya Ivashka won the title after defeating Antoine Hoang 6–4, 3–6, 7–6$^{(7–3)}$ in the final.

## Seeds

* Yasutaka Uchiyama (first round)
* Ilya Ivashka (champion)
* Aslan Karatsev (semifinals)
* Lorenzo Musetti (first round)
* Antoine Hoang (final)
* Federico Gaio (quarterfinals)
* Jurij Rodionov (first round)
* Martin Kližan (second 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 | Final |
| | Alexandre Müller | 6 | 2 | 2 | | | | | |
| 5 | Antoine Hoang | 3 | 6 | 6 | | | | | |
| 5 | Antoine Hoang | 3 | 6 | 6 | 5 | Antoine Hoang | 4 | 6 | 6$^3$ |
| | | | | | 2 | Ilya Ivashka | 6 | 3 | 7$^7$ |
| 3 | Aslan Karatsev | 4 | 4 | | 2 | Ilya Ivashka | 6 | 3 | 7$^7$ |
| 2 | Ilya Ivashka | 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 | Semifinals |
| 1 | Y Uchiyama | 3 | 4 | | | | | | | | | | | | | | | | |
| | A Müller | 6 | 6 | | | A Müller | 7$^7$ | 6$^4$ | 6 | | | | | | | | | | |
| | J Clarke | 6 | 6$^9$ | 6 | | J Clarke | 6$^2$ | 7$^7$ | 3 | | | | | | | | | | |
| WC | Patric Prinoth | 3 | 7$^{11}$ | 3 | | | | | | | A Müller | 6$^5$ | 7$^8$ | 7 | | | | | |
| | S Ofner | 6$^4$ | 1 | | | | | | | | I Marchenko | 7$^7$ | 6$^6$ | 5 | | | | | |
| | I Marchenko | 7$^7$ | 6 | | | I Marchenko | w/o | | | | | | | | | | | | |
| | H Grenier | 5 | 6 | 6 | | H Grenier | | | | | | | | | | | | | |
| 7 | J Rodionov | 7 | 4 | 3 | | | | | | | | | | | | A Müller | 6 | 2 | 2 |
| 4 | L Musetti | 3 | 6$^5$ | | | | | | | | | | | | 5 | A Hoang | 3 | 6 | 6 |
| | R Marcora | 6 | 7$^7$ | | | R Marcora | 3 | 6$^4$ | | | | | | | | | | | |
| SE | L Klein | 3 | 5 | | | J Lenz | 6 | 7$^7$ | | | | | | | | | | | |
| | J Lenz | 6 | 7 | | | | | | | | J Lenz | 7$^8$ | 4 | 3 | | | | | |
| Q | P Kotov | 7$^7$ | 4 | 6 | | | | | | 5 | A Hoang | 6$^6$ | 6 | 6 | | | | | |
| | M Cressy | 6$^5$ | 6 | 4 | Q | P Kotov | 2 | 4 | | | | | | | | | | | |
| | A Rinderknech | 4 | 6 | 6$^5$ | 5 | A Hoang | 6 | 6 | | | | | | | | | | | |
| 5 | A Hoang | 6 | 3 | 7$^7$ | | | | | | | | | | | | | | | |

### 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 |
| 6 | F Gaio | 6 | 6 | | | | | | | | | | | | | |
| Q | A Pellegrino | 3 | 4 | | 6 | F Gaio | 6 | 7 | | | | | | | | |
| Q | A Çelikbilek | 6 | 6 | | Q | A Çelikbilek | 4 | 5 | | | | | | | | |
| | Z Kolář | 4 | 2 | | | | | | 6 | F Gaio | 6$^3$ | 3 | | | | |
| LL | A Vatutin | 1 | 3 | | | | | | 3 | A Karatsev | 7$^7$ | 6 | | | | |
| LL | E Karlovskiy | 6 | 6 | | LL | E Karlovskiy | 5 | 4 | | | | | | | | |
| | M Marterer | 6$^4$ | 2 | | 3 | A Karatsev | 7 | 6 | | | | | | | | |
| 3 | A Karatsev | 7$^7$ | 6 | | | | | | | | | | 3 | A Karatsev | 4 | 4 |
| 8 | M Kližan | 6 | 6 | | | | | | | | | | 2 | I Ivashka | 6 | 6 |
| WC | G Zeppieri | 1 | 3 | | 8 | M Kližan | 4 | 2 | | | | | | | | |
| WC | L Nardi | 6$^4$ | 6$^8$ | | | T Macháč | 6 | 6 | | | | | | | | |
| | T Macháč | 7$^7$ | 7$^{10}$ | | | | | | | T Macháč | 6$^4$ | 6$^5$ | | | | |
| | D Masur | 3 | 7$^{12}$ | 3 | | | | | 2 | I Ivashka | 7$^7$ | 7$^7$ | | | | |
| Q | J Härteis | 6 | 6$^{10}$ | 6 | Q | J Härteis | 6$^6$ | 3 | | | | | | | | |
| | M Viola | 1 | 1 | | 2 | I Ivashka | 7$^8$ | 6 | | | | | | | | |
| 2 | I Ivashka | 6 | 6 | | | | | | | | | | | | | |