# 2018 Engie Open de Seine-et-Marne – Singles

Ekaterina Alexandrova was the defending champion, but lost in the first round to Jessika Ponchet.
Anna Blinkova won the title after Karolína Muchová withdrew from the final.

## Seeds

* Ekaterina Alexandrova (first round)
* Océane Dodin (withdrew)
* Denisa Allertová (first round)
* Viktória Kužmová (first round)
* Pauline Parmentier (second round)
* Arantxa Rus (first round)
* Anna Blinkova (champion)
* Magdalena Fręch (semifinals)

## 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 |
| Q | Karolína Muchová | 6 | 4 | 6 | | | |
| | Anna Kalinskaya | 1 | 6 | 3 | | | |
| | Anna Kalinskaya | 1 | 6 | 3 | Q | Karolína Muchová | |
| | | | | | 7 | Anna Blinkova | w/o |
| 8 | Magdalena Fręch | 4 | 6 | 4 | 7 | Anna Blinkova | w/o |
| 7 | Anna Blinkova | 6 | 3 | 6 | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | E Alexandrova | 3 | 6 | 5 | | | | | | | | | | | | | |
| WC | J Ponchet | 6 | 2 | 7 | WC | J Ponchet | 7 | 7$^7$ | | | | | | | | | |
| Q | J Malečková | 6 | 6 | | Q | J Malečková | 5 | 6$^5$ | | | | | | | | | |
| JE | E Rybakina | 2 | 4 | | | | | | WC | J Ponchet | 6$^5$ | 2 | | | | | |
| | A Lottner | 3 | 5 | | | | | | Q | K Muchová | 7$^7$ | 6 | | | | | |
| Q | K Muchová | 6 | 7 | | Q | K Muchová | 6 | 6 | | | | | | | | | |
| | B Schoofs | 5 | 4 | | 5 | P Parmentier | 3 | 4 | | | | | | | | | |
| 5 | P Parmentier | 7 | 6 | | | | | | | | | | Q | K Muchová | 6 | 4 | 6 |
| 3 | D Allertová | 1 | 2 | | | | | | | | | | | A Kalinskaya | 1 | 6 | 3 |
| | V Zvonareva | 6 | 6 | | | V Zvonareva | 3 | | | | | | | | | | |
| Q | H Tan | 6 | 6 | | Q | H Tan | 0$^r$ | | | | | | | | | | |
| | P Monova | 1 | 4 | | | | | | | V Zvonareva | 1 | 3 | | | | | |
| | V Tomova | 4 | 6$^7$ | | | | | | | A Kalinskaya | 6 | 6 | | | | | |
| | A Kalinskaya | 6 | 7$^9$ | | | A Kalinskaya | 6 | 6 | | | | | | | | | |
| Q | O Doroshina | 6 | 6 | | Q | O Doroshina | 3 | 2 | | | | | | | | | |
| 6 | A Rus | 3 | 4 | | | | | | | | | | | | | | |

### 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 | Semifinals |
| 8 | M Fręch | 6 | 6 | | | | | | | | | | | | | | | | |
| WC | C Paquet | 4 | 4 | | 8 | M Fręch | 6 | 7 | | | | | | | | | | | |
| | A Zaja | 6 | 3 | 4 | | P Badosa Gibert | 1 | 5 | | | | | | | | | | | |
| | P Badosa Gibert | 4 | 6 | 6 | | | | | | 8 | M Fręch | 7 | 7$^7$ | | | | | | |
| | V Diatchenko | 6 | 6 | | | | | | | | V Diatchenko | 5 | 6$^2$ | | | | | | |
| WC | A Albié | 3 | 2 | | | V Diatchenko | 6 | 6 | | | | | | | | | | | |
| LL | K Piter | 2 | 6 | 6 | LL | K Piter | 3 | 4 | | | | | | | | | | | |
| 4 | V Kužmová | 6 | 0 | 4 | | | | | | | | | | | 8 | M Fręch | 4 | 6 | 4 |
| 7 | A Blinkova | 6 | 6 | | | | | | | | | | | | 7 | A Blinkova | 6 | 3 | 6 |
| WC | M Léonard | 1 | 1 | | 7 | A Blinkova | 7 | 6$^5$ | 7 | | | | | | | | | | |
| | T Smitková | 3 | 2 | | LL | U Radwańska | 5 | 7$^7$ | 5 | | | | | | | | | | |
| LL | U Radwańska | 6 | 6 | | | | | | | 7 | A Blinkova | 6 | 4 | 6 | | | | | |
| | A Hesse | 5 | 6$^2$ | | | | | | | | T Korpatsch | 2 | 6 | 2 | | | | | |
| | T Korpatsch | 7 | 7$^7$ | | | T Korpatsch | 3 | 6 | 7$^7$ | | | | | | | | | | |
| | C Scholl | 2 | 0 | | LL | C Ferrando | 6 | 0 | 6$^5$ | | | | | | | | | | |
| LL | C Ferrando | 6 | 6 | | | | | | | | | | | | | | | | |