# 2019 Open de Rennes – Singles

Vasek Pospisil was the defending champion but chose not to defend his title.
Ričardas Berankis won the title after defeating Antoine Hoang 6–4, 6–2 in the final.

## Seeds

All seeds receive a bye into the second round.
* Adrian Mannarino (second round)
* Benoît Paire (quarterfinals, retired)
* Félix Auger-Aliassime (second round)
* Ričardas Berankis (champion)
* Elias Ymer (quarterfinals)
* Marcos Baghdatis (quarterfinals)
* Yannick Maden (semifinals)
* Quentin Halys (quarterfinals)
* Sergiy Stakhovsky (third round)
* Stefano Travaglia (withdrew)
* Dennis Novak (second round)
* Constant Lestienne (second round)
* Lukáš Rosol (third round)
* Antoine Hoang (final)
* Corentin Moutet (semifinals)
* Salvatore Caruso (third 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 | Final |
| 14 | Antoine Hoang | 2 | 7$^7$ | 6 | | | | | | | | | |
| 6 | Marcos Baghdatis | 6 | 6$^5$ | 4 | | | | | | | | | |
| 6 | Marcos Baghdatis | 6 | 6$^5$ | 4 | 14 | Antoine Hoang | 4 | 7$^7$ | 6 | | | | |
| | | | | | 15 | Corentin Moutet | 6 | 6$^4$ | 4 | | | | |
| 15 | Corentin Moutet | 6 | 7 | | 15 | Corentin Moutet | 6 | 6$^4$ | 4 | | | | |
| 8 | Quentin Halys | 4 | 5 | | | | | | | | | | |
| 8 | Quentin Halys | 4 | 5 | | | | | | | 14 | Antoine Hoang | 4 | 2 |
| | | | | | | | | | | 4 | Ričardas Berankis | 6 | 6 |
| 5 | Elias Ymer | 4 | 4 | | | | | | | | | | | 4 | Ričardas Berankis | 6 | 6 |
| 4 | Ričardas Berankis | 6 | 6 | | | | | | | | | | |
| 4 | Ričardas Berankis | 6 | 6 | | 4 | Ričardas Berankis | 6 | 6 | | | | | |
| | | | | | 7 | Yannick Maden | 4 | 4 | | | | | |
| 7 | Yannick Maden | 6 | 2 | | 7 | Yannick Maden | 4 | 4 | | | | | |
| 2 | Benoît Paire | 4 | 1$^r$ | | | | | | | | | | |

### Top half
#### Section 1

| 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 |
| | | | | | 1/WC | A Mannarino | 4 | 6 | 3 | | | | | | | | | | |
| | T de Bakker | 6$^2$ | 6$^5$ | | | J Rodionov | 6 | 4 | 6 | | | | | | | | | | |
| | J Rodionov | 7$^7$ | 7$^7$ | | | | | | | | J Rodionov | 6$^3$ | 6 | 4 | | | | | |
| ITF | J Barranco Cosano | 3 | 1 | | | | | | | 14 | A Hoang | 7$^7$ | 2 | 6 | | | | | |
| | Z Kolář | 6 | 6 | | | Z Kolář | 3 | 4 | | | | | | | | | | | |
| | | | | | 14 | A Hoang | 6 | 6 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | 14 | A Hoang | 2 | 7$^7$ | 6 |
| | | | | | | | | | | | | | | | 6 | M Baghdatis | 6 | 6$^5$ | 4 |
| | | | | | 9 | S Stakhovsky | 4 | 6 | 7$^9$ | | | | | | | | | | |
| WC | E Furness | 6 | 6 | | WC | E Furness | 6 | 3 | 6$^7$ | | | | | | | | | | |
| | F Baldi | 4 | 4 | | | | | | | 9 | S Stakhovsky | 4 | 6$^2$ | | | | | | |
| | N Gombos | 6 | 4 | 6 | | | | | | 6 | M Baghdatis | 6 | 7$^7$ | | | | | | |
| Alt | C Taberner | 0 | 6 | 1 | | N Gombos | 6 | 0 | 1 | | | | | | | | | | |
| | | | | | 6 | M Baghdatis | 4 | 6 | 6 | | | | | | | | | | |

#### 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 |
| | | | | | 3 | F Auger-Aliassime | 4 | 4 | | | | | | | | | | |
| Alt | A Karatsev | 6 | 4 | | Alt | A Karatsev | 6 | 6 | | | | | | | | | | |
| ITF | R Safiullin | 0 | 0$^r$ | | | | | | | Alt | A Karatsev | 2 | 3 | | | | | |
| | M Moraing | 6$^5$ | 0 | | | | | | | 15 | C Moutet | 6 | 6 | | | | | |
| | O Otte | 7$^7$ | 6 | | | O Otte | 4 | 4 | | | | | | | | | | |
| | | | | | 15 | C Moutet | 6 | 6 | | | | | | | | | | |
| | | | | | | | | | | | | | | | 15 | C Moutet | 6 | 7 |
| | | | | | | | | | | | | | | | 8 | Q Halys | 4 | 5 |
| | | | | | 11 | D Novak | 2 | 6 | 6$^5$ | | | | | | | | | |
| Q | G Jacq | 5 | 0$^r$ | | ITF | R Brancaccio | 6 | 1 | 7$^7$ | | | | | | | | | |
| ITF | R Brancaccio | 7 | 1 | | | | | | | ITF | R Brancaccio | 7$^7$ | 4 | 4 | | | | |
| | N Milojević | 5 | 7 | 1 | | | | | | 8 | Q Halys | 6$^4$ | 6 | 6 | | | | |
| | D Masur | 7 | 5 | 6 | | D Masur | 3 | 3 | | | | | | | | | | |
| | | | | | 8 | Q Halys | 6 | 6 | | | | | | | | | | |

### 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 |
| | | | | | 5 | E Ymer | 6 | 6 | | | | | | | | | |
| Q | F Reboul | 7 | 6 | | Q | F Reboul | 1 | 1 | | | | | | | | | |
| | D Gimeno Traver | 5 | 3 | | | | | | | 5 | E Ymer | 6 | 6 | | | | |
| | E Karlovskiy | 6 | 6 | | | | | | | LL | Y Mertens | 3 | 4 | | | | |
| | R Molleker | 4 | 2 | | | E Karlovskiy | 3 | 6$^2$ | | | | | | | | | |
| | | | | | LL | Y Mertens | 6 | 7$^7$ | | | | | | | | | |
| | | | | | | | | | | | | | | 5 | E Ymer | 4 | 4 |
| | | | | | | | | | | | | | | 4 | R Berankis | 6 | 6 |
| | | | | | 16 | S Caruso | 4 | 6 | 6 | | | | | | | | |
| | M Janvier | 4 | 7$^7$ | 3 | | V Galović | 6 | 3 | 3 | | | | | | | | |
| | V Galović | 6 | 6$^5$ | 6 | | | | | | 16 | S Caruso | 3 | 2 | | | | |
| WC | M Guinard | 3 | 6 | 6 | | | | | | 4 | R Berankis | 6 | 6 | | | | |
| ITF | D Kuzmanov | 6 | 3 | 4 | WC | M Guinard | 2 | 4 | | | | | | | | | |
| | | | | | 4 | R Berankis | 6 | 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 7 | Y Maden | 7$^7$ | 6 | | | | | | | | | |
| | A Bublik | 7 | 3 | 6 | | A Bublik | 6$^3$ | 1 | | | | | | | | | |
| WC | H Gaston | 5 | 6 | 3 | | | | | | 7 | Y Maden | 6 | 7$^7$ | | | | |
| | A Arnaboldi | 6 | 3 | 6 | | | | | | | A Arnaboldi | 4 | 6$^2$ | | | | |
| | E Gerasimov | 3 | 6 | 1 | | A Arnaboldi | 4 | 7$^7$ | 6 | | | | | | | | |
| | | | | | 12 | C Lestienne | 6 | 6$^3$ | 3 | | | | | | | | |
| | | | | | | | | | | | | | | 7 | Y Maden | 6 | 2 |
| | | | | | | | | | | | | | | 2 | B Paire | 4 | 1$^r$ |
| | | | | | 13 | L Rosol | 3 | 7$^7$ | 6 | | | | | | | | |
| WC | Antoine Cornut-Chauvinc | 3 | 6$^1$ | | | G Barrère | 6 | 6$^5$ | 3 | | | | | | | | |
| | G Barrère | 6 | 7$^7$ | | | | | | | 13 | L Rosol | 6$^4$ | 2 | | | | |
| | C Hemery | 5 | 7$^{11}$ | 4 | | | | | | 2 | B Paire | 7$^7$ | 6 | | | | |
| | J Ward | 7 | 6$^9$ | 6 | | J Ward | 2 | 6$^5$ | | | | | | | | | |
| | | | | | 2 | B Paire | 6 | 7$^7$ | | | | | | | | | |