# 2019 Banja Luka Challenger – Singles

Alessandro Giannessi was the defending champion but chose not to defend his title.
Tallon Griekspoor won the title after defeating Sumit Nagal 6–2, 6–3 in the final.

## Seeds

All seeds receive a bye into the second round.
* Robin Haase (second round)
* Filippo Baldi (second round)
* Nikola Milojević (second round)
* Federico Coria (quarterfinals)
* Filip Horanský (semifinals)
* Sumit Nagal (final)
* Tallon Griekspoor (champion)
* Carlos Berlocq (third round)
* Rogério Dutra Silva (second round)
* Peđa Krstin (semifinals)
* Andrea Collarini (third round)
* Christopher O'Connell (second round)
* Dmitry Popko (quarterfinals)
* Alejandro Tabilo (quarterfinals)
* Danilo Petrović (second round)
* Facundo Mena (quarterfinals)

## 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 |
| 16 | Facundo Mena | 7$^{10}$ | 5 | 1 | | | | | | | | | |
| 7 | Tallon Griekspoor | 6$^8$ | 7 | 6 | | | | | | | | | |
| 7 | Tallon Griekspoor | 6$^8$ | 7 | 6 | 7 | Tallon Griekspoor | 6 | 4 | 7 | | | | |
| | | | | | 10 | Peđa Krstin | 4 | 6 | 5 | | | | |
| 13 | Dmitry Popko | 4 | 4 | | 10 | Peđa Krstin | 4 | 6 | 5 | | | | |
| 10 | Peđa Krstin | 6 | 6 | | | | | | | | | | |
| 10 | Peđa Krstin | 6 | 6 | | | | | | | 7 | Tallon Griekspoor | 6 | 6 |
| | | | | | | | | | | 6 | Sumit Nagal | 2 | 3 |
| 6 | Sumit Nagal | 6 | 7 | | | | | | | | | | | 6 | Sumit Nagal | 2 | 3 |
| 4 | Federico Coria | 2 | 5 | | | | | | | | | | |
| 4 | Federico Coria | 2 | 5 | | 6 | Sumit Nagal | 7$^7$ | 6 | | | | | |
| | | | | | 5 | Filip Horanský | 6$^1$ | 2 | | | | | |
| 5 | Filip Horanský | 6 | 5 | 6 | 5 | Filip Horanský | 6$^1$ | 2 | | | | | |
| 14 | Alejandro Tabilo | 2 | 7 | 1 | | | | | | | | | |

### 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1 | R Haase | 1 | 4 | | | | | | | | | | |
| | GM Moroni | 6 | 6 | | | GM Moroni | 6 | 6 | | | | | | | | | | |
| WC | Nemanja Malešević | 3 | 0 | | | | | | | | GM Moroni | 4 | 3 | | | | | |
| | C Ugo Carabelli | 6 | 3 | 6 | | | | | | 16 | F Mena | 6 | 6 | | | | | |
| | A Erler | 4 | 6 | 3 | | C Ugo Carabelli | 4 | 3 | | | | | | | | | | |
| | | | | | 16 | F Mena | 6 | 6 | | | | | | | | | | |
| | | | | | | | | | | | | | | 16 | F Mena | 7$^{10}$ | 5 | 1 |
| | | | | | | | | | | | | | | 7 | T Griekspoor | 6$^8$ | 7 | 6 |
| | | | | | 9 | R Dutra Silva | 3 | 1 | | | | | | | | | | |
| | J Sels | 2 | 3 | | | G Clezar | 6 | 6 | | | | | | | | | | |
| | G Clezar | 6 | 6 | | | | | | | | G Clezar | 4 | 3 | | | | | |
| Q | F Reboul | 7$^7$ | 6 | | | | | | | 7 | T Griekspoor | 6 | 6 | | | | | |
| Alt | Jaume Pla Malfeito | 6$^2$ | 3 | | Q | F Reboul | 5 | 6 | 3 | | | | | | | | | |
| | | | | | 7 | T Griekspoor | 7 | 4 | 6 | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 3/WC | N Milojević | 2 | 2 | | | | | | | | | |
| M Miladinović | 6 | 5 | 7$^7$ | | M Miladinović | 6 | 6 | | | | | | | | | |
| TM Etcheverry | 2 | 7 | 6$^5$ | | | | | | M Miladinović | 6$^5$ | 6 | 2 | | | | |
| GA Olivieri | 1 | 7 | 6 | | | | | 13 | D Popko | 7$^7$ | 3 | 6 | | | | |
| S Doumbia | 6 | 5 | 4 | | GA Olivieri | 2 | 1 | | | | | | | | | |
| | | | | 13 | D Popko | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | 13 | D Popko | 4 | 4 |
| | | | | | | | | | | | | | 10 | P Krstin | 6 | 6 |
| | | | | 10 | P Krstin | 6 | 6 | | | | | | | | | |
| Riccardo Balzerani | 7$^7$ | 6 | | | R Balzerani | 2 | 4 | | | | | | | | | |
| M Geerts | 6$^5$ | 1 | | | | | | 10 | P Krstin | 6 | 6 | | | | | |
| Lucas Gerch | 3 | 5 | | | | | | 8 | C Berlocq | 2 | 4 | | | | | |
| A Arnaboldi | 6 | 7 | | | A Arnaboldi | 6$^1$ | 6$^5$ | | | | | | | | | |
| | | | | 8 | C Berlocq | 7$^7$ | 7$^7$ | | | | | | | | | |

### Bottom half
#### Section 3

| 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 6 | S Nagal | 6 | 7$^7$ | | | | | | | | | |
| | I Nedelko | 6 | 7 | | | I Nedelko | 3 | 6$^3$ | | | | | | | | | |
| | Matías Zukas | 1 | 5 | | | | | | | 6 | S Nagal | 6 | 6 | | | | |
| WC | Goran Radanović | 0 | 3 | | | | | | | WC | M Pecotić | 1 | 1 | | | | |
| WC | M Pecotić | 6 | 6 | | WC | M Pecotić | 6 | 5 | 7$^7$ | | | | | | | | |
| | | | | | 12 | C O'Connell | 3 | 7 | 6$^3$ | | | | | | | | |
| | | | | | | | | | | | | | | 6 | S Nagal | 6 | 7 |
| | | | | | | | | | | | | | | 4 | F Coria | 2 | 5 |
| | | | | | 15 | D Petrović | 6 | 5 | 6$^4$ | | | | | | | | |
| | D Kalenichenko | 6 | 6 | | | D Kalenichenko | 3 | 7 | 7$^7$ | | | | | | | | |
| | J Berrettini | 3 | 1 | | | | | | | | D Kalenichenko | 6$^1$ | 0 | | | | |
| | JP Ficovich | 3 | 6 | 3 | | | | | | 4 | F Coria | 7$^7$ | 6 | | | | |
| | V Šafránek | 6 | 1 | 6 | | V Šafránek | 6 | 1 | 1 | | | | | | | | |
| | | | | | 4 | F Coria | 3 | 6 | 6 | | | | | | | | |

#### Section 4

| 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 | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 5 | F Horanský | 6 | 6 | | | | | | | | | | |
| | M Zekić | 6 | 1$^r$ | | | B Crepatte | 1 | 2 | | | | | | | | | | |
| | Baptiste Crepatte | 4 | 1 | | | | | | 5 | F Horanský | 3 | 6 | 6 | | | | | |
| | Y Shimizu | 4 | 6 | 4 | | | | | 11 | A Collarini | 6 | 3 | 3 | | | | | |
| | C Denolly | 6 | 2 | 6 | | C Denolly | 0$^r$ | | | | | | | | | | | |
| | | | | | 11 | A Collarini | 5 | | | | | | | | | | | |
| | | | | | | | | | | | | | | 5 | F Horanský | 6 | 5 | 6 |
| | | | | | | | | | | | | | | 14 | A Tabilo | 2 | 7 | 1 |
| | | | | | 14 | A Tabilo | 6 | 6 | | | | | | | | | | |
| Q | M Sabanov | 6 | 4 | 6 | Q | M Sabanov | 2 | 0 | | | | | | | | | | |
| | N Serdarušić | 1 | 6 | 2 | | | | | 14 | A Tabilo | 6 | 5 | 6 | | | | | |
| | Z Kolář | 6 | 6 | | | | | | | Z Kolář | 0 | 7 | 1 | | | | | |
| WC | Filip Krolo | 0 | 0 | | | Z Kolář | 6 | 6 | | | | | | | | | | |
| | | | | | 2 | F Baldi | 4 | 2 | | | | | | | | | | |