The 2018 Koblenz Open was a professional tennis tournament played on indoor hard courts. It was the second edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Koblenz, Germany between 16 and 21 January 2018.
| 2018 Koblenz Open | |
|---|---|
| Date | 16–21 January |
| Edition | 2nd |
| Surface | Hard (indoor) |
| Location | Koblenz, Germany |
| Champions | |
| Singles | |
 Mats Moraing | |
| Doubles | |
 Romain Arneodo /  Tristan-Samuel Weissborn | |
Singles main-draw entrants edit
Seeds edit
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 RUS
|
Andrey Kuznetsov | 104 | 1 |
 ITA
|
Marco Cecchinato | 106 | 2 |
 UKR
|
Sergiy Stakhovsky | 122 | 3 |
| GER
|
Oscar Otte | 133 | 4 |
| GER
|
Yannick Maden | 146 | 5 |
 FRA
|
Kenny de Schepper | 154 | 6 |
 SVK
|
Andrej Martin | 159 | 7 |
 ESP
|
Tommy Robredo | 163 | 8 |
- 1 Rankings are as of 8 January 2018.
Other entrants edit
The following players received wildcards into the singles main draw:
The following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
Joris De Loore- Christopher Heyman
Filip Horanský
Mikael Ymer
Champions edit
Singles edit
Mats Moraing def. 
Kenny de Schepper 6–2, 6–1.
Doubles edit
Romain Arneodo / 
Tristan-Samuel Weissborn def. 
Sander Arends / 
Antonio Šančić 6–7(4–7), 7–5, [10–6].
