| 2018 Bauer Watertechnology Cup | |
|---|---|
| Date | 29 October – 4 November |
| Edition | 22nd |
| Surface | Carpet |
| Location | Eckental, Germany |
| Champions | |
| Singles | |
 Antoine Hoang | |
| Doubles | |
 Kevin Krawietz / Andreas Mies | |
The 2018 Bauer Watertechnology Cup was a professional tennis tournament played on carpet courts. It was the 22nd edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Eckental, Germany between 29 October and 4 November 2018.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 SVK | Lukáš Lacko | 77 | 1 |
 POL | Hubert Hurkacz | 91 | 2 |
 ESP | Guillermo García López | 96 | 3 |
 RUS | Evgeny Donskoy | 99 | 4 |
| GER | Yannick Maden | 118 | 5 |
 CYP | Marcos Baghdatis | 128 | 6 |
 BEL | Ruben Bemelmans | 134 | 7 |
 AUT | Dennis Novak | 137 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Antoine Hoang def. Ruben Bemelmans 7–5, 6–3. Kevin Krawietz / Andreas Mies def. Hugo Nys / 
Jonny O'Mara 6–1, 6–4.
