| 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 hard courts. 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.The 2011 Busan Open Challenger Tennis was a professional tennis tournament played on hard courts. It was the ninth edition of the tournament which was part of the 2011 ATP Challenger Tour. It took place in Busan, South Korea between 9 and 15 May 2011.
The 2012 Busan Open Challenger Tennis was a professional tennis tournament played on hard courts. It was the tenth edition of the tournament which was part of the 2012 ATP Challenger Tour. It took place in Busan, South Korea between 7 and 13 May 2012.
The 2014 Busan Open Challenger Tour was a professional tennis tournament played on hard courts. It was the thirteenth edition of the tournament which was part of the 2014 ATP Challenger Tour. It took place in Busan, South Korea between 12 and 18 May 2014.
The 2015 Busan Open was a professional tennis tournament played on hard courts. It was the fourteenth edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Busan, South Korea between 4 and 10 May 2015.
The 2017 Gimcheon Open ATP Challenger was a professional tennis tournament played on hard courts. It was the fourth edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Gimcheon, Korea between 1 and 7 May 2017.
The 2017 Busan Open was a professional tennis tournament played on hard courts. It was the sixteenth edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Busan, South Korea between 15 and 21 May 2017.
The 2017 Gwangju Open was a professional tennis tournament played on hard courts. It was the 2nd edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Gwangju, South Korea between 18 and 24 September 2017.
The 2018 Seoul Open Challenger was a professional tennis tournament played on outdoor hard courts. It was the fourth edition of the tournament. It was part of the 2018 ATP Challenger Tour. It took place in Seoul, South Korea, between 30 April and 6 May 2018.
The 2018 Busan Open was a professional tennis tournament played on hard courts. It was the seventeenth edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Busan, South Korea between 14 and 20 May 2018.
The 2019 Da Nang Tennis Open was a professional tennis tournament played on hard courts. It was the first edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Da Nang, Vietnam between 6 and 12 January 2019.
The 2019 Keio Challenger was a professional tennis tournament played on hard courts. It was the fourteenth (men's) and third (women's) editions of the tournament and part of the 2019 ATP Challenger Tour and the 2019 ITF Women's World Tennis Tour. It took place in Yokohama, Japan between 25 February and 10 March 2019.
The 2019 International Challenger Zhangjiagang was a professional tennis tournament played on hard courts. It was the third edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Zhangjiagang, China between 18 and 24 March 2019.
The 2019 Seoul Open Challenger was a professional tennis tournament played on outdoor hard courts. It was the fifth edition of the tournament. It was part of the 2019 ATP Challenger Tour. It took place in Seoul, South Korea, between 29 April and 5 May 2019.
The 2019 Gwangju Open was a professional tennis tournament played on hard courts. It was the 4th edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Gwangju, South Korea between 13 and 19 May 2019.
The 2019 President's Cup was a professional tennis tournament played on outdoor hard courts. It was the fourteenth (ATP) and eleventh (ITF) editions of the tournament and was part of the 2019 ATP Challenger Tour and the 2019 ITF Women's World Tennis Tour. It took place in Nur-Sultan, Kazakhstan, on 15–21 July 2019.
The 2019 Challenger Banque Nationale de Granby was a professional tennis tournament played on outdoor hard courts. It was the twenty-sixth (men) and ninth (women) editions of the tournament which was part of the 2019 ATP Challenger Tour and the 2019 ITF Women's World Tennis Tour. It took place in Granby, Quebec, Canada between 22 and 28 July 2019.
The 2019 Kentucky Bank Tennis Championships was a professional tennis tournament played on outdoor hard courts. It was the 24th (ATP) and 22nd (ITF) editions of the tournament and was part of the 2019 ATP Challenger Tour and the 2019 ITF Women's World Tennis Tour. It took place in Lexington, the United States, from 29 July–to 4 August 2019.
The 2019 Liuzhou Open was a professional tennis tournament played on hard courts. It was the second edition of the tournament for men and fourth edition for women. It was the part of the 2019 ATP Challenger Tour and 2019 ITF Women's World Tennis Tour. It took place in Liuzhou, China between 21 October and 3 November 2019.
The 2022 Seoul Open Challenger was a professional tennis tournament played on outdoor hard courts. It was the sixth edition of the tournament. It was part of the 2022 ATP Challenger Tour. It took place in Seoul, South Korea, between 10 and 16 October 2022.
The 2022 Busan Open was a professional tennis tournament played on hard courts. It was the 19th edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Busan, South Korea between 17 and 23 October 2022.