Laura Siegemund was the defending champion, but lost in the second round to CoCo Vandeweghe.
Karolína Plíšková won the title, defeating Vandeweghe in the final, 7–6(7–2), 6–4.
15-year-old Marta Kostyuk became the youngest player to win a main draw match in Stuttgart since Martina Hingis in October 1994.
Seeds The top four seeds received a bye into the second round.
Draw
Finals
Top half
Bottom half
Qualifying
Seeds
Qualifiers
Lucky loser
Draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
References
External links Main draw Qualifying draw