| Champ: | Alexander Zverev |
| Runner: | Philipp Kohlschreiber |
| Score: | 6–3, 6–3 |
| Type: | singles doubles |
| Draw: | 28 (4 / 3) |
| Seeds: | 8 |
| Before Name: | BMW Open – Singles |
| After Name: | BMW Open – Singles |
See main article: 2018 BMW Open.
Alexander Zverev was the defending champion and successfully defended his title, defeating Philipp Kohlschreiber in the final, 6–3, 6–3.[1]
The top four seeds received a bye into the second round.