2018 Porsche Tennis Grand Prix
| 2018 Porsche Tennis Grand Prix | |
|---|---|
| Date | 22–29 April |
| Edition | 41st |
| Category | Premier |
| Draw | 28S / 16D |
| Prize money | $816,000 |
| Surface | Clay (indoor) |
| Location | Stuttgart, Germany |
| Venue | Porsche-Arena |
| Champions | |
| Singles | |
 Karolína Plíšková | |
| Doubles | |
 Raquel Atawo /  Anna-Lena Grönefeld | |
The 2018 Porsche Tennis Grand Prix was a women's tennis tournament played on indoor clay courts. It was the 41st edition of the Porsche Tennis Grand Prix, and part of the Premier tournaments of the 2018 WTA Tour. It took place at the Porsche Arena in Stuttgart, Germany, from 23 to 29 April 2018.
Points and prize money
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 32 | Q3 | Q2 | Q1 |
| Singles | €107,036 | €57,157 | €30,536 | €16,411 | €8,798 | €5,585 | €2,508 | €1,333 | €742 |
| Doubles * | €33,482 | €17,885 | €9,774 | €4,974 | €2,702 | — | — | — | — |
* per team
Singles main draw entrants
Seeds
| Country | Rank1 | Seed | |
|---|---|---|---|
 ROU
|
Simona Halep | 1 | 1 |
 ESP
|
Garbiñe Muguruza | 3 | 2 |
 UKR
|
Elina Svitolina | 4 | 3 |
 LAT
|
Jeļena Ostapenko | 5 | 4 |
| CZE
|
Karolína Plíšková | 6 | 5 |
 FRA
|
Caroline Garcia | 7 | 6 |
| USA
|
Sloane Stephens | 9 | 7 |
| CZE
|
Petra Kvitová | 10 | 8 |
- 1 Rankings are as of 16 April 2018.
Other entrants
The following players received wildcards into the main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Withdrawals
- Before the tournament
Anastasija Sevastova →replaced by 
Carina Witthöft
Retirements
Doubles main draw entrants
Seeds
| Country | Player | Country | Player | Rank1 | Seed |
|---|---|---|---|---|---|
 SLO
|
Andreja Klepač | ESP
|
María José Martínez Sánchez | 34 | 1 |
 RUS
|
Alla Kudryavtseva | CZE
|
Andrea Sestini Hlaváčková | 42 | 2 |
 NED
|
Kiki Bertens | NED
|
Demi Schuurs | 45 | 3 |
| USA
|
Raquel Atawo | GER
|
Anna-Lena Grönefeld | 59 | 4 |
- 1 Rankings as of April 16, 2018.
Other entrants
The following pair received a wildcard into the main draw:
Finals
Singles
Karolína Plíšková defeated 
CoCo Vandeweghe, 7–6(7–2), 6–4
Doubles
- Raquel Atawo / Anna-Lena Grönefeld defeated Nicole Melichar / Květa Peschke, 6–4, 6–7(5–7), [10–5]