2018 Busan Open
The 2018 Busan Open was a professional tennis tournament played on hardcourts. 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.
Singles main-draw entrants
Seeds
1 Rankings as of May 7, 2018.Other entrants
The following players received wildcards into the singles main draw:- Hong Seong-chan
- Kim Young-seok
- Na Jung-woong
- Oh Chan-yeong
The following players received entry from the qualifying draw: