# 2019 Koblenz Open – Singles

Mats Moraing was the defending champion but chose not to defend his title.
Gianluca Mager won the title after defeating Roberto Ortega Olmedo 2–6, 7–6$^{(8–6)}$, 6–2 in the final.

## Seeds

All seeds receive a bye into the second round.
* Casper Ruud (third round)
* Yannick Maden (third round)
* Alexey Vatutin (quarterfinals, retired)
* Andrea Arnaboldi (second round)
* Daniel Brands (second round)
* James Ward (second round)
* Mikael Ymer (quarterfinals)
* Arthur De Greef (second round)
* Adam Pavlásek (third round)
* Tobias Kamke (second round)
* Filip Horanský (third round)
* Kenny de Schepper (third round)
* Zdeněk Kolář (second round)
* Tallon Griekspoor (semifinals)
* Thiemo de Bakker (third round)
* Uladzimir Ignatik (third 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

### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 14 | Tallon Griekspoor | 6 | 7 | | | | | | | | | | |
| | Kaichi Uchida | 3 | 5 | | | | | | | | | | |
| | Kaichi Uchida | 3 | 5 | | 14 | Tallon Griekspoor | 3 | 6 | 4 | | | | |
| | | | | | | Gianluca Mager | 6 | 2 | 6 | | | | |
| 3 | Alexey Vatutin | 5 | 2$^r$ | | | Gianluca Mager | 6 | 2 | 6 | | | | |
| | Gianluca Mager | 7 | 4 | | | | | | | | | | |
| | Gianluca Mager | 7 | 4 | | | | | | | Gianluca Mager | 2 | 7$^8$ | 6 |
| | | | | | | | | | | Roberto Ortega Olmedo | 6 | 6$^6$ | 2 |
| | Carlos Taberner | 7 | 5 | 1 | | | | | | | | | | Roberto Ortega Olmedo | 6 | 6$^6$ | 2 |
| | Pavel Kotov | 5 | 7 | 6 | | | | | | | | | |
| | Pavel Kotov | 5 | 7 | 6 | | Pavel Kotov | 5 | 6 | 3 | | | | |
| | | | | | | Roberto Ortega Olmedo | 7 | 3 | 6 | | | | |
| 7 | Mikael Ymer | 7$^{10}$ | 1 | 3 | | Roberto Ortega Olmedo | 7 | 3 | 6 | | | | |
| | Roberto Ortega Olmedo | 6$^8$ | 6 | 6 | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1 | C Ruud | 6 | 4 | 6 | | | | | | | | | |
| ITF | R Brancaccio | 6 | 7 | | ITF | R Brancaccio | 4 | 6 | 3 | | | | | | | | | |
| Q | L Wessels | 4 | 5 | | | | | | | 1 | C Ruud | 6 | 1 | 2 | | | | |
| PR | M Przysiężny | 4 | 6 | 6 | | | | | | 14 | T Griekspoor | 3 | 6 | 6 | | | | |
| ITF | J Barranco Cosano | 6 | 3 | 2 | PR | M Przysiężny | 0 | 6 | 3 | | | | | | | | | |
| | | | | | 14 | T Griekspoor | 6 | 2 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | | 14 | T Griekspoor | 6 | 7 |
| | | | | | | | | | | | | | | | | K Uchida | 3 | 5 |
| | | | | | 9 | A Pavlásek | 3 | 6 | 6 | | | | | | | | | |
| | TK Wang | 6 | 6 | | | TK Wang | 6 | 3 | 4 | | | | | | | | | |
| | D Masur | 4 | 2 | | | | | | | 9 | A Pavlásek | 2 | 6 | 6$^3$ | | | | |
| | K Uchida | 0 | 6 | 7 | | | | | | | K Uchida | 6 | 3 | 7$^7$ | | | | |
| | B Zapata Miralles | 6 | 2 | 5 | | K Uchida | 7$^7$ | 6 | | | | | | | | | | |
| | | | | | 8 | A De Greef | 6$^0$ | 4 | | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 3 | A Vatutin | 3 | 7$^9$ | 6 | | | | | | | | | |
| | G Oliveira | 6 | 6 | | | G Oliveira | 6 | 6$^7$ | 2 | | | | | | | | | |
| LL | Bastien Presuhn | 2 | 2 | | | | | | | 3 | A Vatutin | 6 | 6$^6$ | 7$^8$ | | | | |
| Q | P Torebko | 6 | 1 | 6 | | | | | | 16 | U Ignatik | 4 | 7$^8$ | 6$^6$ | | | | |
| WC | Kai Lemstra | 1 | 6 | 1 | Q | P Torebko | 6$^5$ | 3 | | | | | | | | | | |
| | | | | | 16 | U Ignatik | 7$^7$ | 6 | | | | | | | | | | |
| | | | | | | | | | | | | | | | 3 | A Vatutin | 5 | 2$^r$ |
| | | | | | | | | | | | | | | | | G Mager | 7 | 4 |
| | | | | | 11 | F Horanský | 7$^{15}$ | 6 | | | | | | | | | | |
| WC | J Härteis | 7$^7$ | 4 | 6 | WC | J Härteis | 6$^{13}$ | 4 | | | | | | | | | | |
| | V Šafránek | 6$^3$ | 6 | 3 | | | | | | 11 | F Horanský | 6$^4$ | 3 | | | | | |
| | G Mager | 6 | 6 | | | | | | | | G Mager | 7$^7$ | 6 | | | | | |
| ITF | Peter Heller | 4 | 4 | | | G Mager | 2 | 6 | 6 | | | | | | | | | |
| | | | | | 6 | J Ward | 6 | 4 | 4 | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 5 | D Brands | 6$^2$ | 5 | | | | | | | | |
| | C Taberner | 6 | 5 | 6 | | C Taberner | 7$^7$ | 7 | | | | | | | | |
| WC | J Lenz | 4 | 7 | 2 | | | | | | C Taberner | 7$^7$ | 6 | | | | |
| | E Karlovskiy | 6$^7$ | 6 | 5 | | | | | 12 | K de Schepper | 6$^5$ | 2 | | | | |
| | J Hernández-Fernández | 7$^9$ | 4 | 7 | | J Hernández-Fernández | 2 | 1 | | | | | | | | |
| | | | | | 12 | K de Schepper | 6 | 6 | | | | | | | | |
| | | | | | | | | | | | | | C Taberner | 7 | 5 | 1 |
| | | | | | | | | | | | | | P Kotov | 5 | 7 | 6 |
| | | | | | 15 | T de Bakker | 6 | 6 | | | | | | | | |
| | N Serdarušić | 4 | 2 | | WC | B Hassan | 1 | 4 | | | | | | | | |
| WC | B Hassan | 6 | 6 | | | | | | 15 | T de Bakker | 2 | 6$^3$ | | | | |
| | L Grigelis | 6$^6$ | 3 | | | | | | | P Kotov | 6 | 7$^7$ | | | | |
| | P Kotov | 7$^8$ | 6 | | | P Kotov | 6 | 7 | | | | | | | | |
| | | | | | 4 | A Arnaboldi | 4 | 5 | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 7 | M Ymer | 4 | 7$^7$ | 6 | | | | | | | | | | |
| | Z Piros | 4 | 6 | 6 | | Z Piros | 6 | 6$^0$ | 2 | | | | | | | | | | |
| | S Griekspoor | 6 | 0 | 2 | | | | | | 7 | M Ymer | 6 | 5 | 6 | | | | | |
| ITF | R Safiullin | 6 | 6 | | | | | | | ITF | R Safiullin | 2 | 7 | 4 | | | | | |
| | S Nagal | 2 | 1 | | ITF | R Safiullin | 6 | 6$^4$ | 6 | | | | | | | | | | |
| | | | | | 10 | T Kamke | 0 | 7$^7$ | 3 | | | | | | | | | | |
| | | | | | | | | | | | | | | | 7 | M Ymer | 7$^{10}$ | 1 | 3 |
| | | | | | | | | | | | | | | | | R Ortega Olmedo | 6$^8$ | 6 | 6 |
| | | | | | 13 | Z Kolář | 2 | 4 | | | | | | | | | | | |
| WC | M Gengel | 6$^1$ | 3 | | | R Ortega Olmedo | 6 | 6 | | | | | | | | | | | |
| | R Ortega Olmedo | 7$^7$ | 6 | | | | | | | | R Ortega Olmedo | 6 | 3 | 6 | | | | | |
| LL | R Bonadio | 6 | 6 | | | | | | | 2 | Y Maden | 4 | 6 | 3 | | | | | |
| | R Marcora | 4 | 2 | | LL | R Bonadio | 2 | 2 | | | | | | | | | | | |
| | | | | | 2 | Y Maden | 6 | 6 | | | | | | | | | | | |