# 2018 Open Sopra Steria de Lyon – Singles

Félix Auger-Aliassime was the defending champion and successfully defended his title.
Auger-Aliassime won the title after defeating Johan Tatlot 6–7$^{(3–7)}$, 7–5, 6–2 in the final.

## Seeds

* Roberto Carballés Baena (first round)
* Gerald Melzer (first round)
* Pedro Sousa (first round)
* Pablo Andújar (second round, retired)
* Quentin Halys (first round)
* Henri Laaksonen (first round)
* Alexey Vatutin (first round)
* Corentin Moutet (first 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 | Final | Final | Final | Final | Final |
| | Miomir Kecmanović | 2 | 6$^6$ | | | | | |
| | Félix Auger-Aliassime | 6 | 7$^8$ | | | | | |
| | Félix Auger-Aliassime | 6 | 7$^8$ | | Félix Auger-Aliassime | 6$^3$ | 7 | 6 |
| | | | | Q | Johan Tatlot | 7$^7$ | 5 | 2 |
| Q | Johan Tatlot | 7$^7$ | 6 | Q | Johan Tatlot | 7$^7$ | 5 | 2 |
| Q | Roberto Marcora | 6$^1$ | 2 | | | | | |

### 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 |
| 1 | R Carballés Baena | 3 | 5 | | | | | | | | | | | | | | |
| Q | M Ymer | 6 | 7 | | Q | M Ymer | 2 | 6$^7$ | | | | | | | | | |
| | M Vilella Martínez | 4 | 3 | | | M Kecmanović | 6 | 7$^9$ | | | | | | | | | |
| | M Kecmanović | 6 | 6 | | | | | | | | M Kecmanović | 7 | 2 | 6 | | | |
| WC | A Popyrin | 6 | 6 | | | | | | | WC | A Popyrin | 5 | 6 | 4 | | | |
| | V Šafránek | 3 | 3 | | WC | A Popyrin | 6 | 6 | | | | | | | | | |
| | M Bourgue | 7$^8$ | 1 | 7 | | M Bourgue | 4 | 4 | | | | | | | | | |
| 6 | H Laaksonen | 6$^6$ | 6 | 5 | | | | | | | | | | | M Kecmanović | 2 | 6$^6$ |
| 3 | P Sousa | 5 | 3 | | | | | | | | | | | | F Auger-Aliassime | 6 | 7$^8$ |
| WC | A Müller | 7 | 6 | | WC | A Müller | 2 | 7 | 6 | | | | | | | | |
| | K de Schepper | 7 | 2 | 3 | | J Domingues | 6 | 5 | 4 | | | | | | | | |
| | J Domingues | 5 | 6 | 6 | | | | | | WC | A Müller | 3 | 1 | | | | |
| | J Hernández-Fernández | 2 | 2 | | | | | | | | F Auger-Aliassime | 6 | 6 | | | | |
| | A Hoang | 6 | 6 | | | A Hoang | 3 | 5 | | | | | | | | | |
| | F Auger-Aliassime | 6 | 6 | | | F Auger-Aliassime | 6 | 7 | | | | | | | | | |
| 8/WC | C Moutet | 2 | 2 | | | | | | | | | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | A Vatutin | 1 | 3 | | | | | | | | | | | | | | | |
| | DE Galán | 6 | 6 | | | DE Galán | 6 | 2 | 4 | | | | | | | | | |
| WC | E Benchetrit | 5 | 4 | | Q | J Tatlot | 3 | 6 | 6 | | | | | | | | | |
| Q | J Tatlot | 7 | 6 | | | | | | | Q | J Tatlot | 1 | 7$^7$ | 6 | | | | |
| | G Sakharov | 1 | 1 | | | | | | | | A Pavlásek | 6 | 6$^3$ | 3 | | | | |
| | A Pavlásek | 6 | 6 | | | A Pavlásek | 7$^7$ | 0 | 6 | | | | | | | | | |
| | R Quiroz | 2 | 5 | | 4 | P Andújar | 6$^5$ | 6 | 5$^r$ | | | | | | | | | |
| 4 | P Andújar | 6 | 7 | | | | | | | | | | | | Q | J Tatlot | 7$^7$ | 6 |
| 5 | Q Halys | 7 | 4 | 2 | | | | | | | | | | | Q | R Marcora | 6$^1$ | 2 |
| Q | R Marcora | 5 | 6 | 6 | Q | R Marcora | 6 | 7$^7$ | | | | | | | | | | |
| | B Bonzi | 6 | 6 | | | B Bonzi | 0 | 6$^4$ | | | | | | | | | | |
| Q | T Lamasine | 3 | 4 | | | | | | | Q | R Marcora | 6 | 3 | 6 | | | | |
| | M Krueger | 6 | 1 | 6 | | | | | | | C Garín | 1 | 6 | 4 | | | | |
| | P Martínez | 4 | 6 | 0 | | M Krueger | 6 | 3 | 5 | | | | | | | | | |
| | C Garín | 6 | 6 | | | C Garín | 3 | 6 | 7 | | | | | | | | | |
| 2 | G Melzer | 3 | 3 | | | | | | | | | | | | | | | |