| 2018 Busan Open | |
|---|---|
| Date | 14–20 May |
| Edition | 17th |
| Draw | 32S / 16D |
| Surface | Hard |
| Location | Busan, South Korea |
| Champions | |
| Singles | |
 Matthew Ebden | |
| Doubles | |
 Hsieh Cheng-peng /  Christopher Rungkat | |
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.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| AUS | Matthew Ebden | 83 | 1 |
 IND | Yuki Bhambri | 86 | 2 |
 CAN | Vasek Pospisil | 88 | 3 |
 ISR | Dudi Sela | 97 | 4 |
| TPE | Lu Yen-hsun | 111 | 5 |
 USA | Mackenzie McDonald | 114 | 6 |
 JPN | Go Soeda | 149 | 7 |
| TPE | Jason Jung | 154 | 8 |
* 1 Rankings as of May 7, 2018.
The following players received wildcards into the singles main draw:
Hong Seong-chan Kim Young-seok Na Jung-woong Oh Chan-yeongThe following player received entry into the singles main draw as a special exempt:
The following players received entry from the qualifying draw:
Matthew Ebden def. Vasek Pospisil 7–6(7–4), 6–1. Hsieh Cheng-peng / Christopher Rungkat def. 
Ruan Roelofse / John-Patrick Smith 6–4, 6–3.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 Anning Open was a professional tennis tournament played on outdoor clay courts. It was the fourth edition for men and second edition for women of the tournament and part of the 2015 ATP Challenger Tour and the 2015 ITF Women's Circuit, offering a total of $50,000+H for men $75,000 women in prize money. It took place in Anning, China, on 27 April–3 May for men and 4–10 May 2015 for women.
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 2016 Busan Open was a professional tennis tournament played on hard courts. It was the fifteenth edition of the tournament which was part of the 2016 ATP Challenger Tour. It took place in Busan, South Korea between 2 and 8 May 2016.
The 2016 Lecoq Seoul Open was a professional tennis tournament played on outdoor hard courts. It was the second edition of the tournament. It was part of the 2016 ATP Challenger Tour, offering a total of $100,000 in prize money. It took place in Seoul, South Korea, on 9–15 May 2016.
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 Seoul Open Challenger was a professional tennis tournament played on outdoor hard courts. It was the third edition of the tournament. It was part of the 2017 ATP Challenger Tour. It took place in Seoul, South Korea, on 8–14 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 Keio Challenger was a professional tennis tournament played on hard courts. It was the thirteenth (ATP) and second (ITF) editions of the tournament and part of the 2018 ATP Challenger Tour and the 2018 ITF Women's Circuit. It took place in Yokohama, Japan between 26 February and 4 March 2018 for the men's edition and between 5 and 11 March 2018 for the women's.
The 2018 Kunming Open was a professional tennis tournament played on outdoor clay courts. It was the seventh (ATP) c.q. first (WTA) edition of the tournament and part of the 2018 ATP Challenger Tour and the 2018 WTA 125K series. It took place in Anning, China, from 23 April–5 May 2018.
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 Winnipeg National Bank Challenger was a professional tennis tournament played on outdoor hard courts. It was the 3rd edition, for men, and 6th edition, for women, of the tournament and part of the 2018 ATP Challenger Tour and the 2018 ITF Women's Circuit. It took place in Winnipeg, Manitoba, Canada between July 10 and July 15, 2018.
The 2018 Challenger Banque Nationale de Gatineau was a professional tennis tournament played on outdoor hard courts. It was the 3rd edition of the tournament for men and the 5th for women, and it was part of the 2018 ATP Challenger Tour and the 2018 ITF Women's Circuit. It took place in Gatineau, Canada between July 16 and 22, 2018.
The 2018 OEC Kaohsiung was a professional tennis tournament played on hard courts. It was the seventh edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Kaohsiung, Taiwan between 17 and 23 September 2018.
The 2019 Brisbane International was a tournament on the 2019 ATP Tour and 2019 WTA Tour. It was played on outdoor hard courts in Brisbane, Queensland, Australia. It was the eleventh edition of the tournament and took place at the Queensland Tennis Centre in Tennyson. It was held from 30 December 2018 to 6 January 2019 as part of the Australian Open Series in preparation for the first Grand Slam of the year.
The 2018 Liuzhou International Challenger was a professional tennis tournament played on hard courts. It was the first edition of the tournament for men and third edition for women. It was the part of the 2018 ATP Challenger Tour and 2018 ITF Women's Circuit. It took place in Liuzhou, China between 22 and 28 October 2018.
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 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.
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.
