# 2020 Sibiu Open – Singles

Danilo Petrović was the defending champion but chose not to defend his title.
Marc-Andrea Hüsler won the title after defeating Tomás Martín Etcheverry 7–5, 6–0 in the final.

## Seeds

* Arthur Rinderknech (second round)
* Quentin Halys (first round)
* Marc-Andrea Hüsler (champion)
* Francisco Cerúndolo (semifinals)
* Evgeny Karlovskiy (first round)
* Adrián Menéndez Maceiras (first round)
* Malek Jaziri (quarterfinals)
* Shuichi Sekiguchi (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 |
| Q | Carlos Gómez-Herrera | 6$^5$ | 7$^8$ | 4 | | | | |
| 3 | Marc-Andrea Hüsler | 7$^7$ | 6$^6$ | 6 | | | | |
| 3 | Marc-Andrea Hüsler | 7$^7$ | 6$^6$ | 6 | 3 | Marc-Andrea Hüsler | 7 | 6 |
| | | | | | | Tomás Martín Etcheverry | 5 | 0 |
| 4 | Francisco Cerúndolo | 3 | 0 | | | Tomás Martín Etcheverry | 5 | 0 |
| | Tomás Martín Etcheverry | 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 | A Rinderknech | 7 | 6 | | | | | | | | | | | | | | | | |
| | V Durasovic | 5 | 3 | | 1 | A Rinderknech | 3 | 6 | 6$^4$ | | | | | | | | | | |
| | J Härteis | 7 | 6 | | | J Härteis | 6 | 3 | 7$^7$ | | | | | | | | | | |
| WC | ND Ionel | 5 | 2 | | | | | | | | J Härteis | 3 | 7$^{10}$ | 2 | | | | | |
| | V Kopřiva | 2 | 3 | | | | | | | Q | C Gómez-Herrera | 6 | 6$^8$ | 6 | | | | | |
| Q | C Gómez-Herrera | 6 | 6 | | Q | C Gómez-Herrera | 3 | 7$^7$ | 6 | | | | | | | | | | |
| | C Denolly | 6 | 5 | 6 | | C Denolly | 6 | 6$^4$ | 3 | | | | | | | | | | |
| 5 | E Karlovskiy | 3 | 7 | 0 | | | | | | | | | | | Q | C Gómez-Herrera | 6$^5$ | 7$^8$ | 4 |
| 3 | M-A Hüsler | 6 | 7$^7$ | | | | | | | | | | | | 3 | M-A Hüsler | 7$^7$ | 6$^6$ | 6 |
| | L Miedler | 4 | 6$^1$ | | 3 | M-A Hüsler | 6 | 6 | | | | | | | | | | | |
| | O Roca Batalla | 2 | 4 | | | R Ortega Olmedo | 2 | 4 | | | | | | | | | | | |
| | R Ortega Olmedo | 6 | 6 | | | | | | | 3 | M-A Hüsler | 6 | 5 | 6 | | | | | |
| | B Gojo | 7 | 6 | | | | | | | | B Gojo | 4 | 7 | 4 | | | | | |
| | N Serdarušić | 5 | 4 | | | B Gojo | 6 | 6$^1$ | 6 | | | | | | | | | | |
| | MT Barrios Vera | 6 | 6 | | | MT Barrios Vera | 1 | 7$^7$ | 4 | | | | | | | | | | |
| 6 | A Menéndez Maceiras | 2 | 3 | | | | | | | | | | | | | | | | |

### 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 |
| 7 | M Jaziri | 6 | 6 | | | | | | | | | | | | | | |
| | K Żuk | 4 | 2 | | 7 | M Jaziri | 6 | 7$^7$ | | | | | | | | | |
| | O Luz | 6 | 3 | 6 | | O Luz | 3 | 6$^3$ | | | | | | | | | |
| WC | VV Cornea | 1 | 6 | 2 | | | | | | 7 | M Jaziri | 2 | 1 | | | | |
| Q | Elmar Ejupovic | 3 | 6$^2$ | | | | | | | 4 | F Cerúndolo | 6 | 6 | | | | |
| PR | Í Cervantes | 6 | 7$^7$ | | PR | Í Cervantes | 7$^9$ | 3 | 4 | | | | | | | | |
| Q | Matthieu Perchicot | 4 | 3 | | 4 | F Cerúndolo | 6$^7$ | 6 | 6 | | | | | | | | |
| 4 | F Cerúndolo | 6 | 6 | | | | | | | | | | | 4 | F Cerúndolo | 3 | 0 |
| 8 | Shuichi Sekiguchi | 7 | 7$^8$ | | | | | | | | | | | | TM Etcheverry | 6 | 6 |
| WC | D Dima | 5 | 6$^6$ | | 8 | S Sekiguchi | 2 | 3 | | | | | | | | | |
| Alt | F Meligeni Alves | 6 | 6 | | Alt | F Meligeni Alves | 6 | 6 | | | | | | | | | |
| Q | E Kırkın | 4 | 3 | | | | | | | Alt | F Meligeni Alves | 3 | 0 | | | | |
| | S Mukund | 4 | 6$^5$ | | | | | | | | TM Etcheverry | 6 | 6 | | | | |
| | JM Cerúndolo | 6 | 7$^7$ | | | JM Cerúndolo | 4 | 6$^7$ | | | | | | | | | |
| | TM Etcheverry | 7$^7$ | 4 | 7$^7$ | | TM Etcheverry | 6 | 7$^9$ | | | | | | | | | |
| 2 | Q Halys | 6$^3$ | 6 | 6$^2$ | | | | | | | | | | | | | |