# 2019 Open du Pays d'Aix – Singles

John Millman was the defending champion but chose not to defend his title.
Pablo Cuevas won the title after defeating Quentin Halys 7–5, 3–6, 6–2 in the final.

## Seeds

All seeds receive a bye into the second round.
* Pablo Cuevas (champion)
* Jiří Veselý (second round)
* Lloyd Harris (third round)
* Denis Istomin (second round)
* Thiago Monteiro (third round)
* Yannick Maden (second round)
* Grégoire Barrère (second round)
* Guillermo García López (second round)
* Peter Polansky (second round)
* Stefano Travaglia (third round)
* Antoine Hoang (third round)
* Gianluca Mager (quarterfinals)
* Marcos Giron (second round)
* Rudolf Molleker (third round)
* Simone Bolelli (withdrew)
* Lorenzo Giustino (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 | Final | Final | Final | Final | Final |
| 1 | Pablo Cuevas | 7$^7$ | 4 | 6 | | | | | | | | | |
| Q | Elias Ymer | 6$^1$ | 6 | 3 | | | | | | | | | |
| Q | Elias Ymer | 6$^1$ | 6 | 3 | 1 | Pablo Cuevas | 6 | 6 | | | | | |
| | | | | | Alt | Hugo Nys | 3 | 1 | | | | | |
| | Daniel Masur | 6 | 5 | 5 | Alt | Hugo Nys | 3 | 1 | | | | | |
| Alt | Hugo Nys | 4 | 7 | 7 | | | | | | | | | |
| Alt | Hugo Nys | 4 | 7 | 7 | | | | | 1 | Pablo Cuevas | 7 | 3 | 6 |
| | | | | | | | | | | Quentin Halys | 5 | 6 | 2 |
| | Alexey Vatutin | 7 | 7$^7$ | | | | | | | | | | | Quentin Halys | 5 | 6 | 2 |
| | Benjamin Hassan | 5 | 6$^3$ | | | | | | | | | | |
| | Benjamin Hassan | 5 | 6$^3$ | | | Alexey Vatutin | 5 | 3 | | | | | |
| | | | | | | Quentin Halys | 7 | 6 | | | | | |
| 12 | Gianluca Mager | 7$^7$ | 4 | 4 | | Quentin Halys | 7 | 6 | | | | | |
| | Quentin Halys | 6$^5$ | 6 | 6 | | | | | | | | | |

### 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1 | P Cuevas | 4 | 7$^7$ | 7 | | | | | | | | | |
| | S Diez | 6 | 6 | | | S Diez | 6 | 6$^2$ | 5 | | | | | | | | | |
| LL | J Melzer | 3 | 3 | | | | | | | 1 | P Cuevas | 6 | 6 | | | | | |
| WC | M Martineau | 6 | 7$^8$ | | | | | | | 14 | R Molleker | 2 | 2 | | | | | |
| | M-A Hüsler | 3 | 6$^6$ | | WC | M Martineau | 5 | 7$^7$ | 3 | | | | | | | | | |
| | | | | | 14 | R Molleker | 7 | 6$^3$ | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | 1 | P Cuevas | 7$^7$ | 4 | 6 |
| | | | | | | | | | | | | | | Q | E Ymer | 6$^1$ | 6 | 3 |
| | | | | | 10 | S Travaglia | 7$^7$ | 6 | | | | | | | | | | |
| | G Clezar | 2 | 3 | | | R Dutra Silva | 6$^3$ | 3 | | | | | | | | | | |
| | R Dutra Silva | 6 | 6 | | | | | | | 10 | S Travaglia | 5 | 4 | | | | | |
| | Ze Zhang | 7 | 2 | 3 | | | | | | Q | E Ymer | 7 | 6 | | | | | |
| Q | E Ymer | 5 | 6 | 6 | Q | E Ymer | 7$^8$ | 6 | | | | | | | | | | |
| | | | | | 7 | G Barrère | 6$^6$ | 1 | | | | | | | | | | |

#### Section 2

| 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 | Quarterfinals |
| | | | | | 3/WC | L Harris | 7 | 6 | | | | | | | | | | |
| | N Serdarušić | 6$^2$ | 5 | | WC | A Cornut-Chauvinc | 5 | 3 | | | | | | | | | | |
| WC | Antoine Cornut-Chauvinc | 7$^7$ | 7 | | | | | | 3/WC | L Harris | 4 | 3 | | | | | | |
| | K de Schepper | 5 | 6 | 1 | | | | | | D Masur | 6 | 6 | | | | | | |
| | D Masur | 7 | 4 | 6 | | D Masur | 6 | 6 | | | | | | | | | | |
| | | | | | LL | Jonathan Kanar | 2 | 3 | | | | | | | | | | |
| | | | | | | | | | | | | | | | D Masur | 6 | 5 | 5 |
| | | | | | | | | | | | | | | Alt | H Nys | 4 | 7 | 7 |
| | | | | | 9 | P Polansky | 6$^7$ | 4 | | | | | | | | | | |
| | C Hemery | 6 | 6$^5$ | 0$^r$ | Alt | H Nys | 7$^9$ | 6 | | | | | | | | | | |
| Alt | H Nys | 3 | 7$^7$ | 2 | | | | | Alt | H Nys | 5 | 6 | 7$^7$ | | | | | |
| | M Arévalo | 7 | 6 | | | | | | 5/WC | T Monteiro | 7 | 3 | 6$^5$ | | | | | |
| | J Tatlot | 5 | 2 | | | M Arévalo | 6$^5$ | 4 | | | | | | | | | | |
| | | | | | 5/WC | T Monteiro | 7$^7$ | 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 | Third round | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 6 | Y Maden | 6 | 5 | 2 | | | | | | | | |
| | K Krawietz | 6 | 0 | 5 | | A Vatutin | 3 | 7 | 6 | | | | | | | | |
| | A Vatutin | 3 | 6 | 7 | | | | | | | A Vatutin | 6$^6$ | 6 | 6 | | | |
| WC | H Gaston | 6 | 7$^7$ | | | | | | | 11 | A Hoang | 7$^8$ | 3 | 1 | | | |
| Q | D Added | 1 | 6$^3$ | | WC | H Gaston | 2 | 1 | | | | | | | | | |
| | | | | | 11 | A Hoang | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | | A Vatutin | 7 | 7$^7$ |
| | | | | | | | | | | | | | | | B Hassan | 5 | 6$^3$ |
| | | | | | 16 | L Giustino | 6 | 2 | 4 | | | | | | | | |
| | V Troicki | 6 | 6 | | | V Troicki | 4 | 6 | 6 | | | | | | | | |
| | Y Mertens | 3 | 1 | | | | | | | | V Troicki | 2 | 2 | | | | |
| | B Hassan | 6 | 6 | | | | | | | | B Hassan | 6 | 6 | | | | |
| | D Gimeno Traver | 3 | 3 | | | B Hassan | 6 | 6 | | | | | | | | | |
| | | | | | 4 | D Istomin | 4 | 2 | | | | | | | | | |

#### Section 4

| 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 | Quarterfinals |
| | | | | 8 | G García López | 6$^5$ | 4 | | | | | | | | | | |
| T Pütz | 7$^{10}$ | 0 | 2 | | E Couacaud | 7$^7$ | 6 | | | | | | | | | | |
| E Couacaud | 6$^8$ | 6 | 6 | | | | | | | E Couacaud | 5 | 6$^5$ | | | | | |
| J Ward | 7$^8$ | 7$^7$ | | | | | | | 12 | G Mager | 7 | 7$^7$ | | | | | |
| T Lamasine | 6$^6$ | 6$^4$ | | | J Ward | 6$^4$ | 2 | | | | | | | | | | |
| | | | | 12 | G Mager | 7$^7$ | 6 | | | | | | | | | | |
| | | | | | | | | | | | | | 12 | G Mager | 7$^7$ | 4 | 4 |
| | | | | | | | | | | | | | | Q Halys | 6$^5$ | 6 | 6 |
| | | | | 13 | M Giron | 3 | 6 | 4 | | | | | | | | | |
| A Olivetti | 2 | 1 | | | J Šátral | 6 | 2 | 6 | | | | | | | | | |
| J Šátral | 6 | 6 | | | | | | | | J Šátral | 3 | 4 | | | | | |
| E Benchetrit | 7$^7$ | 0 | 4 | | | | | | | Q Halys | 6 | 6 | | | | | |
| Q Halys | 6$^5$ | 6 | 6 | | Q Halys | 6 | 7$^7$ | | | | | | | | | | |
| | | | | 2 | J Veselý | 4 | 6$^1$ | | | | | | | | | | |