# 2018 Monterrey Open – Singles

Anastasia Pavlyuchenkova was the defending champion, but withdrew before the tournament began.
Garbiñe Muguruza won the title, defeating Tímea Babos in the final, 3–6, 6–4, 6–3.

## Seeds

* Garbiñe Muguruza (champion)
* Magdaléna Rybáriková (quarterfinals)
* Lesia Tsurenko (second round, withdrew)
* Tímea Babos (final)
* Monica Puig (quarterfinals)
* Ana Bogdan (semifinals)
* Sachia Vickery (semifinals)
* Ajla Tomljanović (quarterfinals)

## 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 | Final | Final |
| 1 | Garbiñe Muguruza | 6 | 7 | | | | | | |
| 6 | Ana Bogdan | 0 | 5 | | | | | | |
| 6 | Ana Bogdan | 0 | 5 | | 1 | Garbiñe Muguruza | 3 | 6 | 6 |
| | | | | | 4 | Tímea Babos | 6 | 4 | 3 |
| 4 | Tímea Babos | 1 | 6 | 6 | 4 | Tímea Babos | 6 | 4 | 3 |
| 7 | Sachia Vickery | 6 | 2 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | G Muguruza | 6 | 6 | | | | | | | | | | | | | | |
| WC | R Zarazúa | 1 | 1 | | 1 | G Muguruza | 6 | 6 | | | | | | | | | |
| | E Rodina | 0 | 6$^4$ | | | A Riske | 2 | 3 | | | | | | | | | |
| | A Riske | 6 | 7$^7$ | | | | | | | 1 | G Muguruza | 6 | 6 | | | | |
| | A Blinkova | 7$^9$ | 5 | 6 | | | | | | 8 | A Tomljanović | 3 | 0 | | | | |
| | R Peterson | 6$^7$ | 7 | 4 | | A Blinkova | 2 | 7 | 2 | | | | | | | | |
| | AK Schmiedlová | 6 | 1 | 6$^6$ | 8 | A Tomljanović | 6 | 5 | 6 | | | | | | | | |
| 8 | A Tomljanović | 4 | 6 | 7$^8$ | | | | | | | | | | 1 | G Muguruza | 6 | 7 |
| 3 | L Tsurenko | 6$^2$ | 6 | 6 | | | | | | | | | | 6 | A Bogdan | 0 | 5 |
| | N Hibino | 7$^7$ | 4 | 4 | 3 | L Tsurenko | | | | | | | | | | | |
| | M Duque Mariño | 1 | 3 | | | D Collins | w/o | | | | | | | | | | |
| | D Collins | 6 | 6 | | | | | | | | D Collins | 2 | 4 | | | | |
| | S Sorribes Tormo | 6 | 7 | | | | | | | 6 | A Bogdan | 6 | 6 | | | | |
| | T Martincová | 1 | 5 | | | S Sorribes Tormo | 2 | 3 | | | | | | | | | |
| WC | V Rodríguez | 6 | 4 | 6$^5$ | 6 | A Bogdan | 6 | 6 | | | | | | | | | |
| 6 | A Bogdan | 4 | 6 | 7$^7$ | | | | | | | | | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | M Puig | 6 | 6 | | | | | | | | | | | | | | | |
| | N Gibbs | 3 | 3 | | 5 | M Puig | 6 | 6 | | | | | | | | | | |
| | S Vögele | 6 | 6 | | | S Vögele | 4 | 3 | | | | | | | | | | |
| Q | D Jakupović | 3 | 4 | | | | | | | 5 | M Puig | 4 | 2 | | | | | |
| | N Broady | 6 | 6$^5$ | 6 | | | | | | 4 | T Babos | 6 | 6 | | | | | |
| | C Zhao | 3 | 7$^7$ | 2 | | N Broady | 3 | 7$^8$ | 5 | | | | | | | | | |
| Q | M Bouzková | 3 | 4 | | 4 | T Babos | 6 | 6$^6$ | 7 | | | | | | | | | |
| 4 | T Babos | 6 | 6 | | | | | | | | | | | 4 | T Babos | 1 | 6 | 6 |
| 7 | S Vickery | 6 | 6 | | | | | | | | | | | 7 | S Vickery | 6 | 2 | 2 |
| | I Falconi | 1 | 4 | | 7 | S Vickery | 6 | 6 | | | | | | | | | | |
| Q | UM Arconada | 3 | 6 | 4 | WC | AS Sánchez | 3 | 3 | | | | | | | | | | |
| WC | AS Sánchez | 6 | 4 | 6 | | | | | | 7 | S Vickery | 6 | 6 | | | | | |
| Q | V Grammatikopoulou | 0 | 2 | | | | | | | 2 | M Rybáriková | 0 | 3 | | | | | |
| | J Fett | 6 | 6 | | | J Fett | 5 | 2 | | | | | | | | | | |
| | R Ozaki | 4 | 3 | | 2 | M Rybáriková | 7 | 6 | | | | | | | | | | |
| 2 | M Rybáriková | 6 | 6 | | | | | | | | | | | | | | | |

## Qualifying
### Seeds

* Ysaline Bonaventure (first round)
* Miyu Kato (second round)
* Jasmine Paolini (qualifying competition)
* Jamie Loeb (second round)
* Lizette Cabrera (first round)
* Dalila Jakupović (qualified)
* Marie Bouzková (qualified)
* Conny Perrin (qualifying competition)

### Qualifiers

* Valentini Grammatikopoulou
* Dalila Jakupović
* Usue Maitane Arconada
* Marie Bouzková

### Draw
#### First qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Ysaline Bonaventure | 6$^5$ | 7$^7$ | 1 | | | | | | | | |
| | Priscilla Hon | 7$^7$ | 6$^2$ | 6 | | | | | | | | |
| | Priscilla Hon | 7$^7$ | 6$^2$ | 6 | | Priscilla Hon | 6$^4$ | 3 | | | | |
| | | | | | | Valentini Grammatikopoulou | 7$^7$ | 6 | | | | |
| | Tereza Mrdeža | 3 | 6 | 2 | | Valentini Grammatikopoulou | 7$^7$ | 6 | | | | |
| | Valentini Grammatikopoulou | 6 | 2 | 6 | | | | | | | | |
| | Valentini Grammatikopoulou | 6 | 2 | 6 | | | | | | Valentini Grammatikopoulou | 6 | 6 |
| | | | | | | | | | 8 | Conny Perrin | 2 | 2 |
| | Ashley Kratzer | 6 | 1 | 3 | | | | | | | | | 8 | Conny Perrin | 2 | 2 |
| WC | Yana Sizikova | 3 | 6 | 6 | | | | | | | | |
| WC | Yana Sizikova | 3 | 6 | 6 | WC | Yana Sizikova | 5 | 0 | | | | |
| | | | | | 8 | Conny Perrin | 7 | 6 | | | | |
| | Emina Bektas | 3 | 3 | | 8 | Conny Perrin | 7 | 6 | | | | |
| 8 | Conny Perrin | 6 | 6 | | | | | | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Miyu Kato | 6 | 6 | | | | | | | | | | |
| WC | Andrea Renée Villarreal | 2 | 3 | | | | | | | | | | |
| WC | Andrea Renée Villarreal | 2 | 3 | | 2 | Miyu Kato | 6 | 3 | 3 | | | | |
| | | | | | | Sabrina Santamaria | 1 | 6 | 6 | | | | |
| | Nadia Podoroska | 4 | 6 | 5 | | Sabrina Santamaria | 1 | 6 | 6 | | | | |
| | Sabrina Santamaria | 6 | 2 | 7 | | | | | | | | | |
| | Sabrina Santamaria | 6 | 2 | 7 | | | | | | | Sabrina Santamaria | 2 | 5 |
| | | | | | | | | | | 6 | Dalila Jakupović | 6 | 7 |
| | Cornelia Lister | 5 | 6 | 6 | | | | | | | | | | 6 | Dalila Jakupović | 6 | 7 |
| | Valeria Savinykh | 7 | 3 | 2 | | | | | | | | | |
| | Valeria Savinykh | 7 | 3 | 2 | | Cornelia Lister | 4 | 6$^6$ | | | | | |
| | | | | | 6 | Dalila Jakupović | 6 | 7$^8$ | | | | | |
| | Irina Khromacheva | 2 | 3 | | 6 | Dalila Jakupović | 6 | 7$^8$ | | | | | |
| 6 | Dalila Jakupović | 6 | 6 | | | | | | | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Jasmine Paolini | 6 | 2 | 6 | | | | | | | | | |
| WC | Marcela Zacarías | 2 | 6 | 1 | | | | | | | | | |
| WC | Marcela Zacarías | 2 | 6 | 1 | 3 | Jasmine Paolini | 6 | 6 | | | | | |
| | | | | | | Andrea Gámiz | 0 | 0 | | | | | |
| | Miharu Imanishi | 6$^6$ | 6 | 4 | | Andrea Gámiz | 0 | 0 | | | | | |
| | Andrea Gámiz | 7$^8$ | 4 | 6 | | | | | | | | | |
| | Andrea Gámiz | 7$^8$ | 4 | 6 | | | | | 3 | Jasmine Paolini | 1 | 7 | 1 |
| | | | | | | | | | | Usue Maitane Arconada | 6 | 5 | 6 |
| | Jovana Jakšić | 6 | 3 | 6 | | | | | | | | | | Usue Maitane Arconada | 6 | 5 | 6 |
| | Olga Ianchuk | 3 | 6 | 4 | | | | | | | | | |
| | Olga Ianchuk | 3 | 6 | 4 | | Jovana Jakšić | 5 | 1 | | | | | |
| | | | | | | Usue Maitane Arconada | 7 | 6 | | | | | |
| | Usue Maitane Arconada | 6 | 6 | | | Usue Maitane Arconada | 7 | 6 | | | | | |
| 5 | Lizette Cabrera | 3 | 4 | | | | | | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Jamie Loeb | 6 | 6 | | | | | | | | | |
| | Danielle Lao | 3 | 2 | | | | | | | | | |
| | Danielle Lao | 3 | 2 | 4 | Jamie Loeb | 3 | 2 | | | | | |
| | | | | | Deniz Khazaniuk | 6 | 6 | | | | | |
| | Giuliana Olmos | 0 | 2 | | Deniz Khazaniuk | 6 | 6 | | | | | |
| | Deniz Khazaniuk | 6 | 6 | | | | | | | | | |
| | Deniz Khazaniuk | 6 | 6 | | | | | | Deniz Khazaniuk | 2 | 7 | 5 |
| | | | | | | | | 7 | Marie Bouzková | 6 | 5 | 7 |
| | Aliona Bolsova Zadoinov | 6 | 6 | | | | | | | | | | 7 | Marie Bouzková | 6 | 5 | 7 |
| WC | Rushri Wijesundera | 1 | 3 | | | | | | | | | |
| WC | Rushri Wijesundera | 1 | 3 | | Aliona Bolsova Zadoinov | 1 | 2 | | | | | |
| | | | | 7 | Marie Bouzková | 6 | 6 | | | | | |
| | Jacqueline Cako | 3 | 4 | 7 | Marie Bouzková | 6 | 6 | | | | | |
| 7 | Marie Bouzková | 6 | 6 | | | | | | | | | |