The 2023 Busan Open was a professional tennis tournament played on hard courts. It was the 20th edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Busan, South Korea between 8 and 14 May 2023.
Singles main-draw entrants
Seeds
* 1 Rankings as of 24 April 2023.
Other entrants
The following players received wildcards into the singles main draw: Chung Hyeon Chung Yun-seong Nam Ji-sung
The following players received entry into the singles main draw as alternates: Omar Jasika Daniel Masur
The following players received entry from the qualifying draw: Jason Jung Yuki Mochizuki Hiroki Moriya Luke Saville Renta Tokuda Yasutaka Uchiyama
Champions
Singles
Aleksandar Vukic def. Max Purcell 6–4, 1–0 ret.
Doubles
Evan King / Reese Stalder def. Max Purcell / Rubin Statham by walkover.