| 2023 Busan Open | |
|---|---|
| Date | 8–14 May |
| Edition | 20th |
| Surface | Hard |
| Location | Busan, South Korea |
| Champions | |
| Singles | |
 Aleksandar Vukic | |
| Doubles | |
 Evan King / Reese Stalder | |
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.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| AUS | Max Purcell | 89 | 1 |
| USA | Christopher Eubanks | 90 | 2 |
| AUS | Jordan Thompson | 91 | 3 |
 ECU | Emilio Gómez | 115 | 4 |
| AUS | Rinky Hijikata | 141 | 5 |
| AUS | Aleksandar Vukic | 142 | 6 |
 JPN | Kaichi Uchida | 150 | 7 |
 CAN | Gabriel Diallo | 169 | 8 |
* 1 Rankings as of 24 April 2023. [1]
The following players received wildcards into the singles main draw:
The following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
Jason Jung Yuki Mochizuki Hiroki Moriya Luke Saville Renta Tokuda Yasutaka Uchiyama Aleksandar Vukic def. Max Purcell 6–4, 1–0 ret. Evan King / Reese Stalder def. Max Purcell / 
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