# 2019 Gwangju Open – Singles

Maverick Banes was the defending champion but lost in the first round to Shintaro Imai.
Jason Jung won the title after defeating Dudi Sela 6–4, 6–2 in the final.

## Seeds

All seeds receive a bye into the second round.
* Ričardas Berankis (withdrew)
* Sergiy Stakhovsky (third round)
* Brayden Schnur (third round, retired)
* Evgeny Donskoy (quarterfinals)
* Jason Jung (champion)
* Kwon Soon-woo (semifinals)
* Lukáš Lacko (quarterfinals)
* Tatsuma Ito (second round, retired)
* Ruben Bemelmans (third round)
* Yūichi Sugita (third round)
* Max Purcell (second round)
* Dudi Sela (final)
* Li Zhe (quarterfinals)
* Kaichi Uchida (second round)
* Lee Duck-hee (second round)
* Saketh Myneni (second 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 | Final | Final | Final | Final |
| 13 | Li Zhe | 6 | 1 | 4 | | | | | | | | |
| 5 | Jason Jung | 3 | 6 | 6 | | | | | | | | |
| 5 | Jason Jung | 3 | 6 | 6 | 5 | Jason Jung | 6 | 6 | | | | |
| | | | | | | Akira Santillan | 4 | 3 | | | | |
| | Akira Santillan | 6 | 6 | | | Akira Santillan | 4 | 3 | | | | |
| 7 | Lukáš Lacko | 4 | 3 | | | | | | | | | |
| 7 | Lukáš Lacko | 4 | 3 | | | | | | 5 | Jason Jung | 6 | 6 |
| | | | | | | | | | 12 | Dudi Sela | 4 | 2 |
| 12 | Dudi Sela | 7$^7$ | 6 | | | | | | | | | | 12 | Dudi Sela | 4 | 2 |
| 4 | Evgeny Donskoy | 6$^4$ | 2 | | | | | | | | | |
| 4 | Evgeny Donskoy | 6$^4$ | 2 | | 12 | Dudi Sela | 6 | 7 | | | | |
| | | | | | 6 | Kwon Soon-woo | 4 | 5 | | | | |
| 6 | Kwon Soon-woo | 6 | 6 | | 6 | Kwon Soon-woo | 4 | 5 | | | | |
| | Wu Tung-lin | 1 | 0 | | | | | | | | | |

### Top half
#### Section 1

| 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 | Quarterfinals |
| | | | | | Alt | Y Takahashi | 1 | 4 | | | | | | | | | |
| | A Šetkić | 1 | 3 | | | S Mukund | 6 | 6 | | | | | | | | | |
| | S Mukund | 6 | 6 | | | | | | | S Mukund | 5 | 6$^4$ | | | | | |
| ITF | Shintaro Imai | 3 | 6 | 6 | | | | | 13 | Z Li | 7 | 7$^7$ | | | | | |
| | M Banes | 6 | 4 | 2 | ITF | S Imai | 3 | 1 | | | | | | | | | |
| | | | | | 13 | Z Li | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | 13 | Z Li | 6 | 1 | 4 |
| | | | | | | | | | | | | | 5 | J Jung | 3 | 6 | 6 |
| | | | | | 9 | R Bemelmans | 7$^7$ | 6 | | | | | | | | | |
| Alt | Xia Zihao | 4 | 4 | | | F Peliwo | 6$^4$ | 2 | | | | | | | | | |
| | F Peliwo | 6 | 6 | | | | | | 9 | R Bemelmans | 2 | 5 | | | | | |
| | Evan Song | 3 | 4 | | | | | | 5 | J Jung | 6 | 7 | | | | | |
| Q | M-k Song | 6 | 6 | | Q | M-k Song | 3 | 2 | | | | | | | | | |
| | | | | | 5 | J Jung | 6 | 6 | | | | | | | | | |

#### 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 3 | B Schnur | 6 | 6$^3$ | 6 | | | | | | | | |
| | L Saville | 6$^1$ | 6 | 7$^7$ | | L Saville | 2 | 7$^7$ | 2 | | | | | | | | |
| | M Neuchrist | 7$^7$ | 2 | 6$^2$ | | | | | | 3 | B Schnur | 3 | 0$^r$ | | | | |
| | A Santillan | 6 | 6 | | | | | | | | A Santillan | 6 | 3 | | | | |
| ITF | Kim Cheong-eui | 4 | 1 | | | A Santillan | 6 | 6 | | | | | | | | | |
| | | | | | 16 | S Myneni | 2 | 1 | | | | | | | | | |
| | | | | | | | | | | | | | | | A Santillan | 6 | 6 |
| | | | | | | | | | | | | | | 7 | L Lacko | 4 | 3 |
| | | | | | 11 | M Purcell | 1 | 7$^7$ | 5 | | | | | | | | |
| | C İlkel | 7 | 6 | | | C İlkel | 6 | 6$^1$ | 7 | | | | | | | | |
| | K King | 5 | 2 | | | | | | | | C İlkel | 6 | 0$^r$ | | | | |
| ITF | Y Bai | 7$^7$ | 2 | 6 | | | | | | 7 | L Lacko | 2 | 4 | | | | |
| WC | Son Ji-hoon | 6$^5$ | 6 | 3 | ITF | Y Bai | 6$^6$ | 4 | | | | | | | | | |
| | | | | | 7 | L Lacko | 7$^8$ | 6 | | | | | | | | | |

### 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 |
| | | | | | 8 | T Ito | 3 | 1$^r$ | | | | | | | | |
| WC | S-c Hong | 6 | 6$^3$ | 2 | ITF | K Kravchuk | 6 | 2 | | | | | | | | |
| ITF | K Kravchuk | 3 | 7$^7$ | 6 | | | | | ITF | K Kravchuk | 1 | 1 | | | | |
| | D Wu | 2 | 4 | | | | | | 12 | D Sela | 6 | 6 | | | | |
| | Roy Smith | 6 | 6 | | | R Smith | 0 | 2 | | | | | | | | |
| | | | | | 12 | D Sela | 6 | 6 | | | | | | | | |
| | | | | | | | | | | | | | 12 | D Sela | 7$^7$ | 6 |
| | | | | | | | | | | | | | 4 | E Donskoy | 6$^4$ | 2 |
| | | | | | 15 | D-h Lee | 4 | 2 | | | | | | | | |
| WC | J-m Lee | 6$^5$ | 2 | | | Y-s Chung | 6 | 6 | | | | | | | | |
| | Y-s Chung | 7$^7$ | 6 | | | | | | | Y-s Chung | 5 | 4 | | | | |
| Q | C-p Hsieh | 6 | 5 | 3 | | | | | 4 | E Donskoy | 7 | 6 | | | | |
| | Makoto Ochi | 4 | 7 | 6 | | M Ochi | 3 | 4 | | | | | | | | |
| | | | | | 4 | E Donskoy | 6 | 6 | | | | | | | | |

#### Section 4

| 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 |
| | | | | 6 | S-w Kwon | 6 | 7$^7$ | | | | | | | | | |
| | E King | 5 | 3 | | L Broady | 2 | 6$^2$ | | | | | | | | | |
| | L Broady | 7 | 6 | | | | | 6 | S-w Kwon | 6 | 6$^5$ | 6 | | | | |
| WC | J-s Nam | 6 | 6 | | | | | 10 | Y Sugita | 4 | 7$^7$ | 4 | | | | |
| ITF | R Noguchi | 2 | 1 | WC | J-s Nam | 2 | 2 | | | | | | | | | |
| | | | | 10 | Y Sugita | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | 6 | S-w Kwon | 6 | 6 |
| | | | | | | | | | | | | | | T-l Wu | 1 | 0 |
| | | | | 14 | K Uchida | 1 | 4 | | | | | | | | | |
| | T-l Wu | 6 | 6 | | T-l Wu | 6 | 6 | | | | | | | | | |
| | Zh Zhang | 3 | 3 | | | | | | T-l Wu | 6 | 6 | | | | | |
| | T-h Yang | 6 | 7$^{10}$ | | | | | 2 | S Stakhovsky | 4 | 3 | | | | | |
| WC | J-w Na | 3 | 6$^8$ | | T-h Yang | 4 | 6$^3$ | | | | | | | | | |
| | | | | 2 | S Stakhovsky | 6 | 7$^7$ | | | | | | | | | |