| 2019 Busan Open | |
|---|---|
| Date | 6–12 May |
| Edition | 18th |
| Draw | 48S / 16D |
| Surface | Hard |
| Location | Busan, South Korea |
| Champions | |
| Singles | |
 Ričardas Berankis | |
| Doubles | |
 Hsieh Cheng-peng /  Christopher Rungkat | |
The 2019 Busan Open was a professional tennis tournament played on hardcourts. It was the eighteenth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Busan, South Korea between 6 and 12 May 2019.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| LTU | Ričardas Berankis | 102 | 1 |
 UKR | Sergiy Stakhovsky | 115 | 2 |
 CAN | Brayden Schnur | 116 | 3 |
 SVK | Lukáš Lacko | 121 | 4 |
| TPE | Jason Jung | 132 | 5 |
 CYP | Marcos Baghdatis | 135 | 6 |
 RUS | Evgeny Donskoy | 136 | 7 |
 IND | Ramkumar Ramanathan | 146 | 8 |
 SRB | Nikola Milojević | 148 | 9 |
 JPN | Tatsuma Ito | 153 | 10 |
 KOR | Kwon Soon-woo | 162 | 11 |
 BEL | Ruben Bemelmans | 163 | 12 |
| JPN | Yūichi Sugita | 182 | 13 |
| JPN | Hiroki Moriya | 183 | 14 |
| JPN | Go Soeda | 200 | 15 |
| JPN | Yasutaka Uchiyama | 227 | 16 |
* 1 Rankings as of 29 April 2019. [1]
The following players received wildcards into the singles main draw:
Hong Seong-chan Kim Cheong-eui Kim Young-seok Nam Ji-sung Song Min-kyu The following players received entry from the qualifying draw:
Makoto Ochi
Xia Zihao Ričardas Berankis def. 
Andrew Harris 7–6(7–5), 6–2. Hsieh Cheng-peng / Christopher Rungkat def. Toshihide Matsui / Vishnu Vardhan 7–6(9–7), 6–1.