2023 Seoul Open Challenger

Country	Player	Rank1	Seed
AUS	Max Purcell	88	1
USA	Christopher Eubanks	90	2
AUS	Jordan Thompson	91	3
AUS	James Duckworth	113	4
ECU	Emilio Gómez	120	5
AUS	Rinky Hijikata	138	6
AUS	Aleksandar Vukic	140	7
USA	Denis Kudla	145	8

• ¹ Rankings as of 17 April 2023.^[1]

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

• Bu Yunchaokete def. Aleksandar Vukic 7–6^(7–4), 6–4.

• Max Purcell / Yasutaka Uchiyama def. Chung Yun-seong / Yuta Shimizu 6–1, 6–4.