2018 St. Petersburg Ladies' Trophy
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| 2018 St. Petersburg Ladies' Trophy | |
|---|---|
| Date | 29 January–4 February |
| Edition | 9th |
| Category | WTA Premier |
| Prize money | $776,000 |
| Surface | Hard (indoor) |
| Location | Saint Petersburg, Russia |
| Venue | Sibur Arena |
| 2017 Champions | |
| Singles | |
 Kristina Mladenovic | |
| Doubles | |
 Jeļena Ostapenko /  Alicja Rosolska | |
The 2018 St. Petersburg Ladies' Trophy is a professional tennis tournament played on indoor hard courts. It is the 9th edition of the tournament and third time as a WTA Premier tournament. It is part of the 2018 WTA Tour and will be held between 29 January and 4 February 2018.
Point distribution
| Event | W | F | SF | QF | Round of 16 | Round of 32 | Q | Q3 | Q2 | Q1 |
| Singles | 470 | 305 | 185 | 100 | 55 | 1 | 25 | 18 | 13 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|
| Doubles | 1 | — | — | — | — | — |
Prize money
| Event | W | F | SF | QF | Round of 16 | Round of 321 | Q3 | Q2 | Q1 |
| Singles | $132,740 | $70,880 | $37,850 | $20,350 | $10,915 | $6,925 | $3,110 | $1,650 | $920 |
| Doubles* | $41,520 | $22,180 | $12,120 | $6,165 | $3,350 | — | — | — | — |
1Qualifiers prize money is also the Round of 32 prize money.
*per team
Singles main draw entrants
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 DEN
|
Caroline Wozniacki | 2 | 1 |
| LAT
|
Jeļena Ostapenko | 7 | 2 |
| FRA
|
Caroline Garcia | 8 | 3 |
| FRA
|
Kristina Mladenovic | 11 | 4 |
 GER
|
Julia Görges | 12 | 5 |
 RUS
|
Anastasia Pavlyuchenkova | 18 | 6 |
| RUS
|
Elena Vesnina | 19 | 7 |
| RUS
|
Daria Kasatkina | 25 | 8 |
- 1 Rankings as of January 15, 2018.
Other entrants
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Withdrawals
- Before the tournament
Simona Halep →replaced by 
Andrea Petkovic
Ana Konjuh →replaced by Tatjana Maria
Elise Mertens →replaced by Donna Vekić
Anastasija Sevastova →replaced by 
Kateřina Siniaková- Barbora Strýcová →replaced by
Maria Sakkari 
Carla Suárez Navarro →replaced by Mona Barthel
Retirements
Doubles main draw entrants
Seeds
| Country | Player | Country | Player | Rank1 | Seed |
|---|---|---|---|---|---|
 CAN
|
Gabriela Dabrowski |  CHN
|
Xu Yifan | 29 | 1 |
 USA
|
Raquel Atawo | GER
|
Anna-Lena Grönefeld | 55 | 2 |
| USA
|
Nicole Melichar |  CZE
|
Květa Peschke | 57 | 3 |
 CRO
|
Darija Jurak | CZE
|
Renata Voráčová | 86 | 4 |
- 1 Rankings as of January 15, 2018.
Other entrants
The following pair received a wildcard into the doubles main draw:
Champions
Singles
vs.
Doubles
- / vs. /