2017 MercedesCup – Singles
| Singles | |
|---|---|
| 2017 MercedesCup | |
| Champion | Lucas Pouille |
| Runner-up | Feliciano López |
| Score | 4–6, 7–6(7–5), 6–4 |
| Draw | 28 (4 Q / 3 WC ) |
| Seeds | 8 |
Lucas Pouille defeated Feliciano López in the final, 4–6, 7–6(7–5), 6–4 to win the singles tennis title at the 2017 Stuttgart Open. Pouille saved a match point en route to the title, in the second round against Jan-Lennard Struff.
Dominic Thiem was the reigning champion, but chose not to participate this year.