2023 Seoul Open Challenger

The 2023 Seoul Open Challenger was a professional tennis tournament played on outdoor hard courts. It was the seventh edition of the tournament. It was part of the 2023 ATP Challenger Tour. It took place in Seoul, South Korea, between 24 and 30 April 2023.

Seeds

 * 1 Rankings as of 17 April 2023.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇰🇷 Chung Hyeon
 * 🇰🇷 Chung Yun-seong
 * 🇰🇷 Lee Jea-moon

The following player received entry into the singles main draw using a protected ranking:
 * 🇺🇸 Thai-Son Kwiatkowski

The following player received entry into the singles main draw as an alternate:
 * Evgeny Donskoy

The following players received entry from the qualifying draw:
 * 🇩🇪 Peter Gojowczyk
 * 🇯🇵 Tatsuma Ito
 * 🇰🇷 Lee Duck-hee
 * 🇰🇷 Nam Ji-sung
 * 🇮🇳 Mukund Sasikumar
 * 🇯🇵 Yasutaka Uchiyama

Singles

 * 🇨🇳 Bu Yunchaokete def. 🇦🇺 Aleksandar Vukic 7–6(7–4), 6–4.

Doubles

 * 🇦🇺 Max Purcell / 🇯🇵 Yasutaka Uchiyama def. 🇰🇷 Chung Yun-seong / 🇯🇵 Yuta Shimizu 6–1, 6–4.