# 2020 Open de Rennes – Singles

Ričardas Berankis was the defending champion but chose not to defend his title.
Arthur Rinderknech won the title after defeating James Ward 7–5, 6–4 in the final.

## Seeds

All seeds receive a bye into the second round.
* Sergiy Stakhovsky (third round)
* Oscar Otte (second round)
* Danilo Petrović (semifinals)
* Lukáš Lacko (second round)
* Maxime Janvier (second round)
* Alexey Vatutin (third round)
* Bernabé Zapata Miralles (second round)
* Tristan Lamasine (third round)
* Mats Moraing (third round)
* Constant Lestienne (quarterfinals)
* Alexandre Müller (second round, retired)
* Roberto Ortega Olmedo (quarterfinals)
* Tobias Kamke (semifinals)
* Pavel Kotov (second round)
* Cem İlkel (quarterfinals)
* Lucas Miedler (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

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final |
| 13 | Tobias Kamke | 6 | 6 | | | | | | | | | |
| 12 | Roberto Ortega Olmedo | 3 | 3 | | | | | | | | | |
| 12 | Roberto Ortega Olmedo | 3 | 3 | | 13 | Tobias Kamke | 4 | 6 | 3 | | | |
| | | | | | | Arthur Rinderknech | 6 | 2 | 6 | | | |
| 15 | Cem İlkel | 6 | 1 | 4 | | Arthur Rinderknech | 6 | 2 | 6 | | | |
| | Arthur Rinderknech | 3 | 6 | 6 | | | | | | | | |
| | Arthur Rinderknech | 3 | 6 | 6 | | | | | | Arthur Rinderknech | 7 | 6 |
| | | | | | | | | | | James Ward | 5 | 4 |
| 10 | Constant Lestienne | 2 | 6$^6$ | | | | | | | | | | James Ward | 5 | 4 |
| 3 | Danilo Petrović | 6 | 7$^8$ | | | | | | | | | |
| 3 | Danilo Petrović | 6 | 7$^8$ | | 3 | Danilo Petrović | 6$^7$ | 6$^4$ | | | | |
| | | | | | | James Ward | 7$^9$ | 7$^7$ | | | | |
| WC | Kyrian Jacquet | 5 | 6 | 3 | | James Ward | 7$^9$ | 7$^7$ | | | | |
| | James Ward | 7 | 3 | 6 | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1 | S Stakhovsky | 7$^7$ | 6 | | | | | | | | | |
| | M Hamou | 5 | 6$^3$ | | | N Serdarušić | 6$^3$ | 4 | | | | | | | | | |
| | N Serdarušić | 7 | 7$^7$ | | | | | | 1 | S Stakhovsky | 2 | 1 | | | | | |
| Alt | P Niklas-Salminen | 6 | 6 | | | | | | 13 | T Kamke | 6 | 6 | | | | | |
| | L Vanni | 3 | 4 | | Alt | P Niklas-Salminen | 4 | 1 | | | | | | | | | |
| | | | | | 13 | T Kamke | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | 13 | T Kamke | 6 | 6 |
| | | | | | | | | | | | | | | 12 | R Ortega Olmedo | 3 | 3 |
| | | | | | 12 | R Ortega Olmedo | 7$^7$ | 6 | | | | | | | | | |
| | V Šafránek | 4 | 2 | | WC | D Added | 6$^0$ | 3 | | | | | | | | | |
| WC | D Added | 6 | 6 | | | | | | 12 | R Ortega Olmedo | 4 | 6 | 7 | | | | |
| | U Ignatik | 3 | 7$^7$ | 4 | | | | | WC | E Furness | 6 | 2 | 5 | | | | |
| WC | E Furness | 6 | 6$^2$ | 6 | WC | E Furness | 7$^8$ | 6 | | | | | | | | | |
| | | | | | 5 | M Janvier | 6$^6$ | 2 | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 4 | L Lacko | 5 | 2 | | | | | | | | | | | |
| Alt | A Escoffier | 6 | 6 | | Alt | A Escoffier | 7 | 6 | | | | | | | | | | | |
| | M Guinard | 4 | 3 | | | | | | | Alt | A Escoffier | 3 | 6 | 3 | | | | | |
| Alt | A Bega | 2 | 7$^7$ | 7 | | | | | | 15 | C İlkel | 6 | 2 | 6 | | | | | |
| | A Pellegrino | 6 | 6$^5$ | 5 | Alt | A Bega | 4 | 2 | | | | | | | | | | | |
| | | | | | 15 | C İlkel | 6 | 6 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | 15 | C İlkel | 6 | 1 | 4 |
| | | | | | | | | | | | | | | | | A Rinderknech | 3 | 6 | 6 |
| | | | | | 9 | M Moraing | 6 | 6 | | | | | | | | | | | |
| | K-M Maamoun | 7$^7$ | 6 | | | K-M Maamoun | 4 | 3 | | | | | | | | | | | |
| | J Rodionov | 6$^5$ | 3 | | | | | | | 9 | M Moraing | 2 | 3 | | | | | | |
| | A Arnaboldi | 4 | 3 | | | | | | | | A Rinderknech | 6 | 6 | | | | | | |
| | A Rinderknech | 6 | 6 | | | A Rinderknech | 6 | 3 | 7$^7$ | | | | | | | | | | |
| | | | | | 7 | B Zapata Miralles | 3 | 6 | 6$^3$ | | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 6 | A Vatutin | 6 | 6 | | | | | | | | | |
| | M Zverev | 6 | 6 | | | M Zverev | 4 | 4 | | | | | | | | | |
| | Baptiste Crepatte | 0 | 1 | | | | | | | 6 | A Vatutin | 5 | 3 | | | | |
| | T Macháč | 6$^3$ | 7$^7$ | 4 | | | | | | 10 | C Lestienne | 7 | 6 | | | | |
| WC | J Janowicz | 7$^7$ | 6$^4$ | 6 | WC | J Janowicz | 6$^3$ | 4 | | | | | | | | | |
| | | | | | 10 | C Lestienne | 7$^7$ | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | 10 | C Lestienne | 2 | 6$^6$ |
| | | | | | | | | | | | | | | 3 | D Petrović | 6 | 7$^8$ |
| | | | | | 16 | L Miedler | 6$^6$ | 0 | | | | | | | | | |
| Q | T Gabashvili | 6 | 6 | | Q | T Gabashvili | 7$^8$ | 6 | | | | | | | | | |
| | M Eriksson | 1 | 3 | | | | | | | Q | T Gabashvili | 5 | 2 | | | | |
| WC | V Royer | 7$^{10}$ | 6 | | | | | | | 3 | D Petrović | 7 | 6 | | | | |
| | R Roumane | 6$^8$ | 3 | | WC | V Royer | 1 | 6 | 3 | | | | | | | | |
| | | | | | 3 | D Petrović | 6 | 3 | 6 | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 8 | T Lamasine | 6 | 3 | 6 | | | | | | | | | | |
| | V Kopřiva | 3 | 6 | 6 | | V Kopřiva | 3 | 6 | 0 | | | | | | | | | | |
| | V Durasovic | 6 | 3 | 4 | | | | | | 8 | T Lamasine | 6 | 1 | 2 | | | | | |
| WC | K Jacquet | 3 | 7 | 6 | | | | | | WC | K Jacquet | 2 | 6 | 6 | | | | | |
| | A Çelikbilek | 6 | 5 | 0 | WC | K Jacquet | 6 | 0 | | | | | | | | | | | |
| | | | | | 11 | A Müller | 2 | 2$^r$ | | | | | | | | | | | |
| | | | | | | | | | | | | | | | WC | K Jacquet | 5 | 6 | 3 |
| | | | | | | | | | | | | | | | | J Ward | 7 | 3 | 6 |
| | | | | | 14 | P Kotov | 3 | 7$^7$ | 3 | | | | | | | | | | |
| | B Bonzi | 6 | 6$^6$ | 5 | | J Ward | 6 | 6$^5$ | 6 | | | | | | | | | | |
| | J Ward | 3 | 7$^8$ | 7 | | | | | | | J Ward | 6 | 6 | | | | | | |
| Q | C Denolly | 6 | 3 | 6 | | | | | | Q | C Denolly | 4 | 3 | | | | | | |
| | L Klein | 2 | 6 | 3 | Q | C Denolly | 6 | 6 | | | | | | | | | | | |
| | | | | | 2 | O Otte | 4 | 2 | | | | | | | | | | | |