2018 Koblenz Open – Doubles
# 2018 Koblenz Open – Doubles

Hans Podlipnik-Castillo and Andrei Vasilevski were the defending champions but chose not to defend their title.

Romain Arneodo and Tristan-Samuel Weissborn won the title after defeating Sander Arends and Antonio Šančić $6–7^{(4–7)},$ 7–5, [10–6] in the final.

## Seeds

* Sander Arends / Antonio Šančić (final)
* Romain Arneodo / Tristan-Samuel Weissborn (champions)
* Sander Gillé / Joran Vliegen (semifinals)
* Sriram Balaji / Vishnu Vardhan (first round)

## Draw

### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

| First round | First round | First round | First round | First round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | S Arends A Šančić | 6 | 6 | | | | | | | | | | | | | | | | |
| | T Matsui A Motti | 4 | 4 | | 1 | S Arends A Šančić | $7^7$ | 2 | [10] | | | | | | | | | | |
| | L Margaroli Y Uchiyama | 4 | 3 | | | Z Kolář A Pavlásek | $6^2$ | 6 | [5] | | | | | | | | | | |
| | Z Kolář A Pavlásek | 6 | 6 | | | | | | | 1 | S Arends A Šančić | 6 | 3 | [11] | | | | | |
| 4 | S Balaji V Vardhan | 4 | $6^7$ | | | | | | | | G Panfil V Uzhylovskyi | 4 | 6 | [9] | | | | | |
| WC | J Choinski M Möller | 6 | $7^9$ | | WC | J Choinski M Möller | 6 | 1 | [4] | | | | | | | | | | |
| | T Bednarek D Pel | $6^{12}$ | 4 | | | G Panfil V Uzhylovskyi | 4 | 6 | [10] | | | | | | | | | | |
| | G Panfil Volodymyr Uzhylovskyi | $7^{14}$ | 6 | | | | | | | | | | | | 1 | S Arends A Šančić | $7^7$ | 5 | [6] |
| | I Sabanov M Sabanov | 4 | 6 | [13] | | | | | | | | | | | 2 | R Arneodo T-S Weissborn | $6^4$ | 7 | [10] |
| | K Krawietz R Roelofse | 6 | 3 | [11] | | I Sabanov M Sabanov | $7^9$ | 4 | [6] | | | | | | | | | | |
| WC | Raphael Loukas N Serdarušić | 2 | 2 | | 3 | S Gillé J Vliegen | $6^7$ | 6 | [10] | | | | | | | | | | |
| 3 | S Gillé J Vliegen | 6 | 6 | | | | | | | 3 | S Gillé J Vliegen | 6 | 3 | [4] | | | | | |
| | M Moraing O Otte | 2 | 6 | [15] | | | | | | 2 | R Arneodo T-S Weissborn | 3 | 6 | [10] | | | | | |
| WC | B Hassan N Kuhn | 6 | 4 | [13] | | M Moraing O Otte | | | | | | | | | | | | | |
| | M Draganja T Draganja | 4 | 6 | [3] | 2 | R Arneodo T-S Weissborn | w/o | | | | | | | | | | | | |
| 2 | R Arneodo T-S Weissborn | 6 | 1 | [10] | | | | | | | | | | | | | | | |
