# 2018 St. Petersburg Ladies' Trophy – Singles

Kristina Mladenovic was the defending champion, but lost in the final to unseeded Petra Kvitová, 1–6, 2–6. As a result, Kvitová became the first left-handed player to win a singles title in Russia. She was also the first wildcard to win the event.

## Seeds

The top four seeds received a bye into the second round.
* Caroline Wozniacki (quarterfinals)
* Jeļena Ostapenko (quarterfinals)
* Caroline Garcia (second round)
* Kristina Mladenovic (final)
* Julia Görges (semifinals)
* Anastasia Pavlyuchenkova (first round)
* Elena Vesnina (first round)
* Daria Kasatkina (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 | Final |
| 8 | Daria Kasatkina | 6 | 3 | 2 | | | | |
| 4 | Kristina Mladenovic | 3 | 6 | 6 | | | | |
| 4 | Kristina Mladenovic | 3 | 6 | 6 | 4 | Kristina Mladenovic | 1 | 2 |
| | | | | | WC | Petra Kvitová | 6 | 6 |
| 5 | Julia Görges | 5 | 6 | 2 | WC | Petra Kvitová | 6 | 6 |
| WC | Petra Kvitová | 7 | 4 | 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 | C Wozniacki | 6 | 6 | | | | | | | | | |
| WC | A Potapova | 6 | 6 | | WC | A Potapova | 0 | 1 | | | | | | | | | |
| | T Maria | 2 | 4 | | | | | | 1 | C Wozniacki | 6$^2$ | 3 | | | | | |
| | M Barthel | 3 | 5 | | | | | | 8 | D Kasatkina | 7$^7$ | 6 | | | | | |
| | A Cornet | 6 | 7 | | | A Cornet | 2 | 1 | | | | | | | | | |
| Q | V Kužmová | 6 | 4 | 1 | 8 | D Kasatkina | 6 | 6 | | | | | | | | | |
| 8 | D Kasatkina | 1 | 6 | 6 | | | | | | | | | 8 | D Kasatkina | 6 | 3 | 2 |
| | | | | | | | | | | | | | 4 | K Mladenovic | 3 | 6 | 6 |
| | | | | | 4 | K Mladenovic | 6 | 6 | | | | | | | | | |
| | S Cîrstea | 5 | 2 | | | D Cibulková | 4 | 4 | | | | | | | | | |
| | D Cibulková | 7 | 6 | | | | | | 4 | K Mladenovic | 6 | 6 | | | | | |
| | D Vekić | 3 | 6 | 4 | | | | | | K Siniaková | 4 | 3 | | | | | |
| | K Siniaková | 6 | 2 | 6 | | K Siniaková | 7$^9$ | 7 | | | | | | | | | |
| | E Makarova | 6 | 6 | | | E Makarova | 6$^7$ | 5 | | | | | | | | | |
| 6 | A Pavlyuchenkova | 4 | 4 | | | | | | | | | | | | | | |

### Bottom half

| 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 | J Görges | 6 | 7$^7$ | | | | | | | | | | | | | | |
| | M Sakkari | 2 | 6$^5$ | 5 | J Görges | 7 | 6 | | | | | | | | | | |
| Q | R Vinci | 6 | 6 | Q | R Vinci | 5 | 0 | | | | | | | | | | |
| Q | T Martincová | 2 | 2 | | | | | | 5 | J Görges | 6 | 6 | | | | | |
| | T Bacsinszky | 4 | 3 | | | | | | Q | E Rybakina | 3 | 3 | | | | | |
| Q | E Rybakina | 6 | 6 | Q | E Rybakina | 4 | 7$^8$ | 7$^7$ | | | | | | | | | |
| | | | | 3 | C Garcia | 6 | 6$^6$ | 6$^5$ | | | | | | | | | |
| | | | | | | | | | | | | | 5 | J Görges | 5 | 6 | 2 |
| 7/WC | E Vesnina | 2 | 0 | | | | | | | | | | WC | P Kvitová | 7 | 4 | 6 |
| WC | P Kvitová | 6 | 6 | WC | P Kvitová | 6 | 1 | 6 | | | | | | | | | |
| | I-C Begu | 7$^7$ | 6 | | I-C Begu | 3 | 6 | 1 | | | | | | | | | |
| LL | A Petkovic | 6$^5$ | 1 | | | | | | WC | P Kvitová | 6 | 6 | | | | | |
| WC | V Zvonareva | 6 | 0 | | | | | | 2 | J Ostapenko | 0 | 2 | | | | | |
| | K Bertens | 4 | 0$^r$ | WC | V Zvonareva | 6$^6$ | 3 | | | | | | | | | | |
| | | | | 2 | J Ostapenko | 7$^8$ | 6 | | | | | | | | | | |

## Qualifying
### Seeds

* Kristýna Plíšková (second round)
* Natalia Vikhlyantseva (qualifying competition)
* Heather Watson (first round)
* Kirsten Flipkens (first round)
* Océane Dodin (second round)
* Lara Arruabarrena (first round)
* Ekaterina Alexandrova (first round)
* Andrea Petkovic (qualifying competition, lucky loser)

### Qualifiers

* Tereza Martincová
* Viktória Kužmová
* Roberta Vinci
* Elena Rybakina

### Lucky loser

* Andrea Petkovic

### Qualifying draw
#### First 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 |
| 1 | Kristýna Plíšková | 6 | 6 | | | | | | | | | | |
| | Başak Eraydın | 0 | 2 | | | | | | | | | | |
| | Başak Eraydın | 0 | 2 | | 1 | Kristýna Plíšková | 6 | 4 | 4 | | | | |
| | | | | | | Tereza Martincová | 3 | 6 | 6 | | | | |
| | Tereza Martincová | 6 | 6 | | | Tereza Martincová | 3 | 6 | 6 | | | | |
| WC | Anastasia Frolova | 3 | 1 | | | | | | | | | | |
| WC | Anastasia Frolova | 3 | 1 | | | | | | | Tereza Martincová | 6 | 5 | 6 |
| | | | | | | | | | | Vera Lapko | 4 | 7 | 1 |
| | Viktoriya Tomova | 2 | 6 | 1 | | | | | | | | | | Vera Lapko | 4 | 7 | 1 |
| | Vera Lapko | 6 | 4 | 6 | | | | | | | | | |
| | Vera Lapko | 6 | 4 | 6 | | Vera Lapko | 7 | 6 | | | | | |
| | | | | | 5 | Océane Dodin | 5 | 4 | | | | | |
| PR | Bojana Jovanovski Petrović | 4 | 3 | | 5 | Océane Dodin | 5 | 4 | | | | | |
| 5 | Océane Dodin | 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 | Natalia Vikhlyantseva | 6 | 6 | | | | | | | | | | |
| | Valentyna Ivakhnenko | 2 | 1 | | | | | | | | | | |
| | Valentyna Ivakhnenko | 2 | 1 | | 2 | Natalia Vikhlyantseva | 6 | 6 | | | | | |
| | | | | | | Jana Čepelová | 3 | 2 | | | | | |
| | Jana Čepelová | 7$^{10}$ | 2 | 6 | | Jana Čepelová | 3 | 2 | | | | | |
| | Sara Errani | 6$^8$ | 6 | 3 | | | | | | | | | |
| | Sara Errani | 6$^8$ | 6 | 3 | | | | | | 2 | Natalia Vikhlyantseva | 2 | 5 |
| | | | | | | | | | | | Viktória Kužmová | 6 | 7 |
| WC | Amina Anshba | 4 | 2 | | | | | | | | | | | Viktória Kužmová | 6 | 7 |
| | Viktória Kužmová | 6 | 6 | | | | | | | | | | |
| | Viktória Kužmová | 6 | 6 | | | Viktória Kužmová | 6 | 3 | 6 | | | | |
| | | | | | | Dayana Yastremska | 3 | 6 | 4 | | | | |
| | Dayana Yastremska | 4 | 6 | 6 | | Dayana Yastremska | 3 | 6 | 4 | | | | |
| 7 | Ekaterina Alexandrova | 6 | 3 | 2 | | | | | | | | | |

#### 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 | Heather Watson | 3 | 4 | | | | | | | | | | |
| | Roberta Vinci | 6 | 6 | | | | | | | | | | |
| | Roberta Vinci | 6 | 6 | | | Roberta Vinci | 6 | 6 | | | | | |
| | | | | | | Danka Kovinić | 1 | 2 | | | | | |
| | Jasmine Paolini | 4 | 6 | 2 | | Danka Kovinić | 1 | 2 | | | | | |
| | Danka Kovinić | 6 | 3 | 6 | | | | | | | | | |
| | Danka Kovinić | 6 | 3 | 6 | | | | | | Roberta Vinci | 6 | 4 | 6 |
| | | | | | | | | | 8 | Andrea Petkovic | 1 | 6 | 3 |
| | Polina Monova | 6 | 6 | | | | | | | | | | | 8 | Andrea Petkovic | 1 | 6 | 3 |
| WC | Valeriya Pogrebnyak | 4 | 0 | | | | | | | | | | |
| WC | Valeriya Pogrebnyak | 4 | 0 | | | Polina Monova | 3 | 2 | | | | | |
| | | | | | 8 | Andrea Petkovic | 6 | 6 | | | | | |
| | Anna Kalinskaya | 3 | 7 | 2 | 8 | Andrea Petkovic | 6 | 6 | | | | | |
| 8 | Andrea Petkovic | 6 | 5 | 6 | | | | | | | | | |

#### Fourth 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 |
| 4 | Kirsten Flipkens | 2 | 0 | | | | | | | | | | |
| | Deborah Chiesa | 6 | 6 | | | | | | | | | | |
| | Deborah Chiesa | 6 | 6 | | | Deborah Chiesa | 6 | 2 | 6 | | | | |
| | | | | | | Jana Fett | 2 | 6 | 4 | | | | |
| | Sesil Karatantcheva | 6 | 3 | 3 | | Jana Fett | 2 | 6 | 4 | | | | |
| | Jana Fett | 3 | 6 | 6 | | | | | | | | | |
| | Jana Fett | 3 | 6 | 6 | | | | | | | Deborah Chiesa | 1 | 3 |
| | | | | | | | | | | WC | Elena Rybakina | 6 | 6 |
| WC | Elena Rybakina | 3 | 6 | 6 | | | | | | | | | | WC | Elena Rybakina | 6 | 6 |
| | Veronika Kudermetova | 6 | 3 | 2 | | | | | | | | | |
| | Veronika Kudermetova | 6 | 3 | 2 | WC | Elena Rybakina | 6 | 6 | | | | | |
| | | | | | | Sabina Sharipova | 4 | 4 | | | | | |
| | Sabina Sharipova | 3 | 7$^7$ | 7 | | Sabina Sharipova | 4 | 4 | | | | | |
| 6 | Lara Arruabarrena | 6 | 6$^4$ | 5 | | | | | | | | | |