| Date: | 2–8 November |
| Edition: | 19th |
| Surface: | Carpet |
| Location: | Eckental, Germany |
| Champs: |  Mikhail Youzhny |
The 2015 Bauer Watertechnology Cup was a professional tennis tournament played on carpet courts. It was the 19th edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Eckental, Germany between 2 November and 8 November 2015.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Lithuania | Ričardas Berankis | 75 | 1 | |
 Belgium | Ruben Bemelmans | 90 | 2 | |
 Turkey | Marsel İlhan | 97 | 3 | |
| Benjamin Becker | 108 | 4 | ||
| Dustin Brown | 109 | 5 | ||
 Slovakia | Lukáš Lacko | 115 | 6 | |
 Italy | Luca Vanni | 119 | 7 | |
 Uzbekistan | Farrukh Dustov | 126 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw with a protected ranking:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
See main article: 2015 Bauer Watertechnology Cup – Singles.
Mikhail Youzhny def. Benjamin Becker 7–5, 6–3See main article: 2015 Bauer Watertechnology Cup – Doubles.
Ruben Bemelmans / Philipp Petzschner def. 
Ken Skupski / Neal Skupski 7–5, 6–2
