# 2017 Gwangju Open – Singles

Ričardas Berankis was the defending champion but chose not to defend his title.
Matthias Bachinger won the title after defeating Yang Tsung-hua 6–3, 6–4 in the final.

## Seeds

* Jordan Thompson (withdrew)
* Peter Polansky (semifinals)
* Matthew Ebden (second round)
* Lee Duck-hee (quarterfinals)
* Tatsuma Ito (semifinals)
* Yasutaka Uchiyama (first round)
* Hiroki Moriya (first round)
* Kwon Soon-woo (quarterfinals)
* Mohamed Safwat (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

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 5 | Tatsuma Ito | 6$^3$ | 3 | | | | | |
| | Matthias Bachinger | 7$^7$ | 6 | | | | | |
| | Matthias Bachinger | 7$^7$ | 6 | | | Matthias Bachinger | 6 | 6 |
| | | | | | Q | Yang Tsung-hua | 3 | 4 |
| Q | Yang Tsung-hua | 6 | 5 | 6 | Q | Yang Tsung-hua | 3 | 4 |
| 2 | Peter Polansky | 4 | 7 | 2 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 9 | M Safwat | 7$^7$ | 6 | | | | | | | | | | | | | | |
| | O Jasika | 6$^4$ | 3 | | 9 | M Safwat | 2 | 4 | | | | | | | | | |
| LL | Lorenzo Frigerio | 3 | 4 | | | S Diez | 6 | 6 | | | | | | | | | |
| | S Diez | 6 | 6 | | | | | | | | S Diez | 2 | 4 | | | | |
| | T Chen | 2 | 2 | | | | | | | 5 | T Ito | 6 | 6 | | | | |
| PR | B Klahn | 6 | 6 | | PR | B Klahn | 5 | 6 | 3 | | | | | | | | |
| | M Polmans | 1 | 1 | | 5 | T Ito | 7 | 1 | 6 | | | | | | | | |
| 5 | T Ito | 6 | 6 | | | | | | | | | | | 5 | T Ito | 6$^3$ | 3 |
| 4 | D-h Lee | 7$^7$ | 6 | | | | | | | | | | | | M Bachinger | 7$^7$ | 6 |
| Q | Yuya Kibi | 6$^4$ | 2 | | 4 | D-h Lee | 6 | 6 | | | | | | | | | |
| WC | Park Jun-sang | 1 | 0 | | | A Bega | 4 | 3 | | | | | | | | | |
| | A Bega | 6 | 6 | | | | | | | 4 | D-h Lee | 3 | 5 | | | | |
| WC | S-c Hong | 6 | 4 | 6$^2$ | | | | | | | M Bachinger | 6 | 7 | | | | |
| | L Saville | 2 | 6 | 7$^7$ | | L Saville | 3 | 4 | | | | | | | | | |
| | M Bachinger | 6 | 7$^7$ | | | M Bachinger | 6 | 6 | | | | | | | | | |
| 6 | Y Uchiyama | 3 | 6$^5$ | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | H Moriya | 3 | 4 | | | | | | | | | | | | | | | | |
| | J Statham | 6 | 6 | | | J Statham | 7$^7$ | 5 | 1 | | | | | | | | | | |
| | Shuichi Sekiguchi | 5 | 6$^4$ | | Q | T-h Yang | 6$^5$ | 7 | 6 | | | | | | | | | | |
| Q | T-h Yang | 7 | 7$^7$ | | | | | | | Q | T-h Yang | 6 | 7$^7$ | | | | | | |
| Q | M Matosevic | 6 | 0 | 6 | | | | | | Q | M Matosevic | 1 | 6$^3$ | | | | | | |
| WC | Kim Cheong-eui | 3 | 6 | 4 | Q | M Matosevic | 6 | 4 | 7 | | | | | | | | | | |
| WC | Sin Dong-hak | 5 | 3 | | 3 | M Ebden | 3 | 6 | 5 | | | | | | | | | | |
| 3 | M Ebden | 7 | 6 | | | | | | | | | | | | Q | T-h Yang | 6 | 5 | 6 |
| 8 | S-w Kwon | 6 | 6 | | | | | | | | | | | | 2 | P Polansky | 4 | 7 | 2 |
| | T Niki | 4 | 1 | | 8 | S-w Kwon | 1 | 6 | 6 | | | | | | | | | | |
| | Y Takahashi | 6 | 5 | 3 | Q | M Ochi | 6 | 1 | 0 | | | | | | | | | | |
| Q | Makoto Ochi | 3 | 7 | 6 | | | | | | 8 | S-w Kwon | 6 | 4 | 6$^6$ | | | | | |
| | M Giron | 6 | 7$^8$ | | | | | | | 2 | P Polansky | 2 | 6 | 7$^8$ | | | | | |
| | N Kuhn | 4 | 6$^6$ | | | M Giron | 4 | 6 | 6$^3$ | | | | | | | | | | |
| LL | K Takeuchi | 2 | 4 | | 2 | P Polansky | 6 | 3 | 7$^7$ | | | | | | | | | | |
| 2 | P Polansky | 6 | 6 | | | | | | | | | | | | | | | | |