2018 Porsche Tennis Grand Prix

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.

Prize money

 * per team

Seeds

 * 1 Rankings are as of 16 April 2018.

Other entrants
The following players received wildcards into the main draw:
 * 🇩🇪 Antonia Lottner
 * 🇷🇺 Maria Sharapova
 * 🇩🇪 Laura Siegemund
 * 🇺🇸 CoCo Vandeweghe

The following players received entry from the qualifying draw:
 * 🇰🇿 Zarina Diyas
 * 🇺🇦 Marta Kostyuk
 * 🇷🇺 Veronika Kudermetova
 * 🇨🇿 Markéta Vondroušová

The following player received entry as a lucky loser:
 * 🇩🇪 Carina Witthöft

Withdrawals

 * Before the tournament
 * Anastasija Sevastova →replaced by 🇩🇪 Carina Witthöft

Retirements

 * 🇩🇪 Angelique Kerber
 * 🇪🇸 Garbiñe Muguruza
 * 🇨🇿 Markéta Vondroušová

Seeds

 * 1 Rankings as of April 16, 2018.

Other entrants
The following pair received a wildcard into the main draw:
 * 🇩🇪 Antonia Lottner / 🇩🇪 Lena Rüffer

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]