# 2018 Montreux Ladies Open – Singles

María Teresa Torró Flor was the defending champion, but chose not to participate.
Iga Świątek won the title, defeating Kimberley Zimmermann in the final, 6–2, 6–2.

## Seeds

* Mariana Duque Mariño (semifinals)
* Conny Perrin (second round)
* Martina Trevisan (second round)
* Tamara Korpatsch (second round)
* Bibiane Schoofs (second round)
* Deborah Chiesa (first round)
* Katarina Zavatska (first round)
* Çağla Büyükakçay (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 |
| 1 | Mariana Duque Mariño | 2 | 3 | | | |
| | Iga Świątek | 6 | 6 | | | |
| | Iga Świątek | 6 | 6 | Iga Świątek | 6 | 6 |
| | | | | Kimberley Zimmermann | 2 | 2 |
| | Kimberley Zimmermann | 7 | 6 | Kimberley Zimmermann | 2 | 2 |
| | Ylena In-Albon | 5 | 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 | Semifinals |
| 1 | M Duque Mariño | 6 | 6 | | | | | | | | | | | | | | | |
| | C Scholl | 1 | 1 | | 1 | M Duque Mariño | 1 | 6 | 6 | | | | | | | | | |
| Q | S Wagner | 6 | 6 | | Q | S Wagner | 6 | 1 | 2 | | | | | | | | | |
| | I Shinikova | 4 | 2 | | | | | | | 1 | M Duque Mariño | 6$^4$ | 6 | 7 | | | | |
| WC | A Sadiković | 7 | 6 | | | | | | | WC | A Sadiković | 7$^7$ | 2 | 5 | | | | |
| | G Gatto-Monticone | 5 | 1 | | WC | A Sadiković | 0 | 6 | 6 | | | | | | | | | |
| | C Paquet | 6 | 3 | 6 | | C Paquet | 6 | 2 | 1 | | | | | | | | | |
| 7 | K Zavatska | 3 | 6 | 1 | | | | | | | | | | | 1 | M Duque Mariño | 2 | 3 |
| 4 | T Korpatsch | 6 | 6 | | | | | | | | | | | | | I Świątek | 6 | 6 |
| Q | T Sugnaux | 1 | 2 | | 4 | T Korpatsch | 6 | 1 | 3 | | | | | | | | | |
| WC | S Waltert | 6 | 2 | 3 | | E-G Ruse | 3 | 6 | 6 | | | | | | | | | |
| | E-G Ruse | 4 | 6 | 6 | | | | | | | E-G Ruse | 6 | 1 | 2 | | | | |
| | I Świątek | 6 | 6 | | | | | | | | I Świątek | 2 | 6 | 6 | | | | |
| | A Hesse | 4 | 1 | | | I Świątek | 6 | 6 | | | | | | | | | | |
| | D Marcinkēviča | 6 | 6 | | | D Marcinkēviča | 0 | 1 | | | | | | | | | | |
| 6 | D Chiesa | 4 | 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 | Semifinals | Semifinals | Semifinals |
| 8 | Ç Büyükakçay | 5 | 6 | 1 | | | | | | | | | | | |
| | M Zanevska | 7 | 4 | 6 | | M Zanevska | 2 | 6 | 1 | | | | | | |
| | K Zimmermann | 6 | 6 | | | K Zimmermann | 6 | 3 | 6 | | | | | | |
| Q | A Mitu | 2 | 2 | | | | | | | K Zimmermann | 7 | 6 | | | |
| | M Osaka | 6 | 6 | | | | | | | M Osaka | 5 | 4 | | | |
| | M Kilnarová | 2 | 1 | | | M Osaka | 6 | 6 | | | | | | | |
| Q | C Ferrando | 4 | 6 | 3 | 3 | M Trevisan | 3 | 2 | | | | | | | |
| 3 | M Trevisan | 6 | 3 | 6 | | | | | | | | | K Zimmermann | 7 | 6 |
| 5 | B Schoofs | 6 | 6 | | | | | | | | | | Y In-Albon | 5 | 2 |
| | J Paolini | 0 | 4 | | 5 | B Schoofs | 3 | 2 | | | | | | | |
| | Y In-Albon | 6 | 6 | | | Y In-Albon | 6 | 6 | | | | | | | |
| WC | T Bacsinszky | 1 | 2 | | | | | | | Y In-Albon | 6 | 7 | | | |
| WC | L Küng | 6 | 1 | 6$^7$ | | | | | | J Grabher | 4 | 5 | | | |
| | J Grabher | 2 | 6 | 7$^9$ | | J Grabher | 6 | 4 | 6 | | | | | | |
| | M González | 1 | 4 | | 2 | C Perrin | 2 | 6 | 4 | | | | | | |
| 2 | C Perrin | 6 | 6 | | | | | | | | | | | | |