| Singles | |
|---|---|
| 2019 Busan Open | |
| Champion |  Ričardas Berankis |
| Runner-up |  Andrew Harris |
| Final score | 7–6(7–5), 6–2 |
Matthew Ebden was the defending champion but chose not to defend his title. [1]
Ričardas Berankis won the title after defeating Andrew Harris 7–6(7–5), 6–2 in the final.
All seeds receive a bye into the second round.
Ričardas Berankis (champion)
Sergiy Stakhovsky (second round)
Brayden Schnur (second round)
Lukáš Lacko (third round)
Jason Jung (second round)
Marcos Baghdatis (third round)
Evgeny Donskoy (quarterfinals)
Ramkumar Ramanathan (second round)
Nikola Milojević (second round)
Tatsuma Ito (quarterfinals)
Kwon Soon-woo (second round)
Ruben Bemelmans (second round) Yūichi Sugita (second round) Hiroki Moriya (second round) Go Soeda (quarterfinals) Yasutaka Uchiyama (semifinals)| Quarterfinals | Semifinals | Final | ||||||||||||||||||
| 1 | Ričardas Berankis | 5 | 6 | 6 | ||||||||||||||||
| Chung Yun-seong | 7 | 3 | 4 | |||||||||||||||||
| 1 | Ričardas Berankis | 6 | 7 | |||||||||||||||||
| 16 | Yasutaka Uchiyama | 2 | 5 | |||||||||||||||||
| 16 | Yasutaka Uchiyama | 4 | 6 | 6 | ||||||||||||||||
| 10 | Tatsuma Ito | 6 | 0 | 3 | ||||||||||||||||
| 1 | Ričardas Berankis | 77 | 6 | |||||||||||||||||
| Andrew Harris | 65 | 2 | ||||||||||||||||||
| 7 | Evgeny Donskoy | 4 | 65 | |||||||||||||||||
| Andrew Harris | 6 | 77 | ||||||||||||||||||
| Andrew Harris | 5 | 78 | 2 | |||||||||||||||||
| Akira Santillan | 7 | 66 | 1r | |||||||||||||||||
| Akira Santillan | 6 | 6 | ||||||||||||||||||
| 15 | Go Soeda | 3 | 3 | |||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 1 | R Berankis | 1 | 79 | 6 | |||||||||||||||||||||||
 L Broady | 7 | 6 | L Broady | 6 | 67 | 4 | |||||||||||||||||||||
| Q |  Xia Zihao | 5 | 1 | 1 | R Berankis | 6 | 3 | 6 | |||||||||||||||||||
| Q | Makoto Ochi | 63 | 4 | D-h Lee | 3 | 6 | 3 | ||||||||||||||||||||
| D-h Lee | 77 | 6 | D-h Lee | 5 | 6 | 77 | |||||||||||||||||||||
| 13 | Y Sugita | 7 | 3 | 63 | |||||||||||||||||||||||
| 1 | R Berankis | 5 | 6 | 6 | |||||||||||||||||||||||
| Y-s Chung | 7 | 3 | 4 | ||||||||||||||||||||||||
| 9 | N Milojević | 2 | 6 | 5 | |||||||||||||||||||||||
| Y-s Chung | 3 | 6 | 6 | Y-s Chung | 6 | 3 | 7 | ||||||||||||||||||||
| Z Li | 6 | 3 | 4 | Y-s Chung | 6 | 6 | |||||||||||||||||||||
 Evan Song | 6 | 3 | 3 | 6 | M Baghdatis | 2 | 3 | ||||||||||||||||||||
 D Sela | 3 | 6 | 6 | D Sela | 6 | 2 | 2 | ||||||||||||||||||||
| 6 | M Baghdatis | 4 | 6 | 6 | |||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 4 | L Lacko | 3 | 6 | 6 | |||||||||||||||||||||||
| WC | Kim Young-seok | 1 | 0 | L Saville | 6 | 3 | 4 | ||||||||||||||||||||
| L Saville | 6 | 6 | 4 | L Lacko | 6 | 4 | 0 | ||||||||||||||||||||
| M Banes | 6 | 710 | 16 | Y Uchiyama | 3 | 6 | 6 | ||||||||||||||||||||
| WC | Kim Cheong-eui | 1 | 68 | M Banes | 4 | 2 | |||||||||||||||||||||
| 16 | Y Uchiyama | 6 | 6 | ||||||||||||||||||||||||
| 16 | Y Uchiyama | 4 | 6 | 6 | |||||||||||||||||||||||
| 10 | T Ito | 6 | 0 | 3 | |||||||||||||||||||||||
| 10 | T Ito | 6 | 77 | ||||||||||||||||||||||||
| T-l Wu | 77 | 7 | T-l Wu | 4 | 62 | ||||||||||||||||||||||
 M Neuchrist | 62 | 5 | 10 | T Ito | 7 | 66 | 6 | ||||||||||||||||||||
 C İlkel | 6 | 77 | C İlkel | 5 | 78 | 4 | |||||||||||||||||||||
| WC | J-s Nam | 4 | 62 | C İlkel | 6 | 77 | |||||||||||||||||||||
| 8 | R Ramanathan | 1 | 60 | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 7 | E Donskoy | 6 | 6 | ||||||||||||||||||||||||
| S Mukund | 79 | 3 | 7 | S Mukund | 2 | 1 | |||||||||||||||||||||
| S Myneni | 67 | 6 | 5 | 7 | E Donskoy | 6 | 77 | ||||||||||||||||||||
| WC | M-k Song | 6 | 3 | 2 | E King | 2 | 63 | ||||||||||||||||||||
| E King | 3 | 6 | 6 | E King | 64 | 7 | 710 | ||||||||||||||||||||
| 12 | R Bemelmans | 77 | 5 | 68 | |||||||||||||||||||||||
| 7 | E Donskoy | 4 | 65 | ||||||||||||||||||||||||
| A Harris | 6 | 77 | |||||||||||||||||||||||||
| 14 | H Moriya | 5 | 3 | ||||||||||||||||||||||||
 S Robert | 4 | 2 | A Harris | 7 | 6 | ||||||||||||||||||||||
| A Harris | 6 | 6 | A Harris | 6 | 4 | 6 | |||||||||||||||||||||
| M Purcell | 6 | 6 | M Purcell | 4 | 6 | 2 | |||||||||||||||||||||
| F Peliwo | 4 | 3 | M Purcell | 6 | 6 | ||||||||||||||||||||||
| 3 | B Schnur | 4 | 3 | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 5 | J Jung | 3 | 6 | 2 | |||||||||||||||||||||||
 A Šetkić | 2 | 2 | A Santillan | 6 | 3 | 6 | |||||||||||||||||||||
| A Santillan | 6 | 6 | A Santillan | 711 | 6 | ||||||||||||||||||||||
| T-h Yang | 6 | 6 | T-h Yang | 69 | 1 | ||||||||||||||||||||||
| K King | 3 | 4 | T-h Yang | 6 | 714 | ||||||||||||||||||||||
| 11 | S-w Kwon | 3 | 612 | ||||||||||||||||||||||||
| A Santillan | 6 | 6 | |||||||||||||||||||||||||
| 15 | G Soeda | 3 | 3 | ||||||||||||||||||||||||
| 15 | G Soeda | 6 | 6 | ||||||||||||||||||||||||
| D Wu | 6 | 3 | 6 | D Wu | 1 | 1 | |||||||||||||||||||||
| Roy Smith | 3 | 6 | 1 | 15 | G Soeda | 6 | 6 | ||||||||||||||||||||
| WC | S-c Hong | 2 | 5 | K Uchida | 4 | 3 | |||||||||||||||||||||
| K Uchida | 6 | 7 | K Uchida | 710 | 6 | ||||||||||||||||||||||
| 2 | S Stakhovsky | 68 | 3 | ||||||||||||||||||||||||
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